2 Samuel 15:22

all the Gittites, six hundred men--These were a body of foreign guards, natives of Gath, whom David, when in the country of the Philistines, had enlisted in his service, and kept around his person. Addressing their commander, Ittai, he made a searching trial of their fidelity in bidding them (Sa2 15:19) abide with the new king.

Here is, I. The notice brought to David of Absalom's rebellion, Sa2 15:13. The matter was bad enough, and yet it seems to have been made worse to him (as such things commonly are) than really it was; for he was told that the hearts of the men of Israel (that is, the generality of them, at least the leading men) were after Absalom. But David was the more apt to believe it because now he could call to mind the arts that Absalom had used to inveigle them, and perhaps reflected upon it with regret that he had not done more to counterwork him, and secure his own interest, which he had been too confident of. Note, It is the wisdom of princes to make sure of their subjects; for, if they have them, they have their purses, and arms, and all, at their service.
II. The alarm this gave to David, and the resolutions he came to thereupon. We may well imagine him in a manner thunderstruck, when he heard that the son he loved so dearly, and had been so indulgent to, was so unnaturally and ungratefully in arms against him. Well might he say with Caesar, Kai su teknon - What, thou my son? Let not parents raise their hopes too high from their children, lest they be disappointed. David did not call a council, but, consulting only with God and his own heart, determined immediately to quit Jerusalem, Sa2 15:14. He took up this strange resolve, so disagreeable to his character as a man of courage, either, 1. As a penitent, submitting to the rod, and lying down under God's correcting hand. Conscience now reminded him of his sin in the matter of Uriah, and the sentence he was under for it, which was that evil should arise against him out of his own house. "Now," thinks he, "the word of God begins to be fulfilled, and it is not for me to contend with it or fight against it; God is righteous and I submit." Before unrighteous Absalom he could justify himself and stand it out; but before the righteous God he must condemn himself and yield to his judgments. Thus he accepts the punishment of his iniquity. Or, 2. As a politician. Jerusalem was a great city, but not tenable; it should seem, by David's prayer (Psa 51:18), that the walls of it were not built up, much less was it regularly fortified. It was too large to be garrisoned by so small a force as David had now with him, He had reason to fear that the generality of the inhabitants were too well affected to Absalom to be true to him. Should he fortify himself here, he might lose the country, in which, especially among those that lay furthest from Absalom's tampering, he hoped to have the most friends. And he had such a kindness for Jerusalem that he was loth to make it the seat of war, and expose it to the calamities of a siege; he will rather quit it tamely to the rebels. Note, Good men, when they suffer themselves, care not how few are involved with them in suffering.
III. His hasty flight from Jerusalem. His servants agreed to the measures he took, faithfully adhered to him (Sa2 15:15), and assured him of their inviolable allegiance, whereupon, 1. He went out of Jerusalem himself on foot, while his son Absalom had chariots and horses. It is not always the best man, nor the best cause, that makes the best figure. See here, not only the servant, but the traitor, on horseback, while the prince, the rightful prince, walks as a servant upon the earth, Ecc 10:7. Thus he chose to do, to abase himself so much the more under God's hand, and in condescension to his friends and followers, with whom he would walk, in token that he would live and die with them. 2. He took his household with him, his wives and children, that he might protect them in this day of danger, and that they might be a comfort to him in this day of grief. Masters of families, in their greatest frights, must not neglect their households. Ten women, that were concubines, he left behind, to keep the house, thinking that the weakness of their sex would secure them from murder, and their age and relation to him would secure them from rape; but God overruled this for the fulfilling of his word. 3. He took his life-guard with him, or band of pensioners, the Cherethites and Pelethites, who were under the command of Benaiah, and the Gittites, who were under the command of Ittai, Sa2 15:18. These Gittites seem to have been, by birth, Philistines of Gath, who came, a regiment of them, 600 in all, to enter themselves in David's service, having known him at Gath, and being greatly in love with him for his virtue and piety, and having embraced the Jews' religion. David made them of his garde du corps - his body-guard, and they adhered to him in his distress. The Son of David found not such great faith in Israel as in a Roman centurion and a woman of Canaan. 4. As many as would, of the people of Jerusalem, he took with him, and made a halt at some distance from the city, to draw them up, Sa2 15:17. He compelled none. Those whose hearts were with Absalom, to Absalom let them go, and so shall their doom be: they will soon have enough of him. Christ enlists none but volunteers.
IV. His discourse with Ittai the Gittite, who commanded the Philistine-proselytes.
1. David dissuaded him from going along with him, Sa2 15:19, Sa2 15:20. Though he and his men might be greatly serviceable to him yet, (1.) He would try whether he was hearty for him, and not inclined to Absalom. He therefore bids him return to his post in Jerusalem, and serve the new king. If he was no more than a soldier of fortune (as we say), he would be for that side which would pay and prefer him best; and to that side let him go. (2.) If he was faithful to David, yet David would not have him exposed to the fatigues and perils he now counted upon. David's tender spirit cannot bear to think that a stranger and an exile, a proselyte and a new convert, who ought, by all means possible, to be encouraged and made easy, should, at his first coming, meet with such hard usage: "Should I make thee go up and down with us? No, return with thy brethren." Generous souls are more concerned at the share others have in their troubles than at their own. Ittai shall therefore be dismissed with a blessing: Mercy and truth be with thee, that is, God's mercy and truth, mercy according to promise, the promise made to those who renounce other gods and put themselves under the wings off the divine Majesty. This is a very proper pious farewell, when we part with a friend, "Mercy and truth be with thee, and then thou art safe, and mayest be easy, wherever thou art." David's dependence was upon the mercy and truth of God for comfort and happiness, both for himself and his friends; see Psa 61:7.
2. Ittai bravely resolved not to leave him, Sa2 15:21. Where David is, whether in life or death, safe or in peril, there will this faithful friend of his be; and he confirms this resolution with an oath, that he might not be tempted to break it. Such a value has he for David, not for the sake of his wealth and greatness (for then he would have deserted him now that he saw him thus reduced), but for the sake of his wisdom and goodness, which were still the same, that, whatever comes of it, he will never leave him. Note, That is a friend indeed who loves at all times, and will adhere to us in adversity. Thus should we cleave to the Son of David with full purpose of heart that neither life nor death shall separate us from his love.
V. The common people's sympathy with David in his affliction. When he and his attendants passed over the brook Kidron (the very same brook that Christ passed over when he entered upon his sufferings, Joh 18:1), towards the way of the wilderness, which lay between Jerusalem and Jericho, all the country wept with a loud voice, Sa2 15:23. Cause enough there was for weeping, 1. To see a prince thus reduced, one that had lived so great forced from his palace and in fear of his life, with a small retinue seeking shelter in a desert, to see the city of David, which he himself won, built, and fortified, made an unsafe abode for David himself. It would move the compassion even of strangers to see a man fallen thus low from such a height, and this by the wickedness of his own son; a piteous case it was. Parents that are abused and ruined by their own children merit the tender sympathy of their friends as much as any of the sons or daughters of affliction. Especially, 2. To see their own prince thus wronged, who had been so great a blessing to their land, and had not done any thing to forfeit the affections of his people; to see him in this distress, and themselves unable to help him, might well draw floods of tears from their eyes.

Mercy and truth be with thee - May God ever show thee mercy, as thou showest it to me, and his truth ever preserve thee from error and delusion!

And David said unto Ittai, go, and pass over,.... It being his resolution to abide with him, he urged him no more to depart, but bid him pass over the brook Kidron before him:

and Ittai the Gittite passed over, and all his men; the six hundred Gittites that were under his command:

and all the little ones that were with him; that belonged to him and his men, and no doubt their wives also.

For being so deeply engaged for David, he durst not leave his little ones to Absalom’ s mercy.

After this assurance of his devotedness, David let Ittai do as he pleased. ועבר לך, "go and pass on." עבר does not mean to pass by, but to go forward. Thus Ittai and his men and all his family that was with him went forward with the king. By "the little ones" (taph) we are to understand a man's whole family, as in many other instances (see at Exo 12:37).
Sa2 15:22-23
The king crosses the Kidron, and sends the priests back with the ark to Jerusalem. - Sa2 15:23. All the land (as in Sa1 14:25) wept aloud when all the people went forward; and the king went over the brook Kidron, and all the people went over in the direction of (lit. in the face of) the way to the desert. The brook Kidron is a winter torrent, i.e., a mountain torrent which only flows during the heavy rains of winter (χείμαῤῥος τοῦ Κεδρών, Joh 18:1). It is on the eastern side of Jerusalem, between the city and the Mount of Olives, and derives its name from the appearance of the water when rendered muddy through the melting of the snow (cf. Job 6:16). In summer it is nothing more than a dry channel in the valley of Jehoshaphat (see Robinson, Pal. i. 396, and v. Raumer, Pal. p. 309, note 81). "The wilderness" (midbar) is the northern part of the desert of Judah, through which the road to Jericho and the Jordan lay.
Sa2 15:24
Zadok the priest and all the Levites (who were in Jerusalem) left the city with the fugitive king, bearing the ark of the covenant: "And they set down the ark of God, and Abiathar came up, till all the people had come completely over from the city." ויּעל, ἀνέβη, ascendit (lxx, Vulg.), may probably be accounted for from the fact that Abiathar did not come to join the fugitives till the procession halted at the Mount of Olives; so that עלה, like ἀναβαίνειν, merely refers to his actually going up, and ויּעל affirms that Abiathar joined them until all the people from the city had arrived. The rendering proposed by Michaelis and Bttcher ("he offered sacrifices") is precluded by the fact that עלה never means to sacrifice when written without עולה, or unless the context points distinctly to sacrifices, as in Sa2 24:22; Sa1 2:28. The ark of the covenant was put down, because those who went out with the king made a halt, to give the people who were still coming time to join the procession.
Sa2 15:25-26
Then the king said to Zadok, "Take back the ark of God into the city! If I find favour in the eyes of Jehovah, He will bring me back and let me see Him (i.e., himself: the reference is to God) and His dwelling (i.e., the ark of the covenant as the throne of the divine glory in the tent that had been set up for it). But if He thus say, I have not delight in thee; behold, here am I, let Him do to me as seemeth good to Him." Thus David put his fate in believing confidence into the hand of the Lord, because he felt that it was the Lord who was chastising him for his sons through this rebellion.
Sa2 15:27-28
He also said still further to Zadok, "Thou seer! return into the city in peace." אתּה הרואה, with ה interrog., does not yield any appropriate sense, as ה cannot stand for הלוא here, simply because it does not relate to a thing which the person addressed could not deny. Consequently the word must be pointed thus, הראה (with the article), and rendered as a vocative, as it has been by Jerome and Luther. ראה, seer, is equivalent to prophet. He applies this epithet to Zadok, as the high priest who received divine revelations by means of the Urim. The meaning is, Thou Zadok art equal to a prophet; therefore thy proper place is in Jerusalem (O. v. Gerlach). Zadok was to stand as it were upon the watch there with Abiathar, and the sons of both to observe the events that occurred, and send him word through their sons into the plain of the Jordan. "Behold, I will tarry by the ferries of the desert, till a word comes from you to show me," sc., what has taken place, or how the things shape themselves in Jerusalem. Instead of בּעברות, the earlier translators as well as the Masoretes adopted the reading בּערבות, "in the steppes of the desert." The allusion in this case would be to the steppes of Jericho (Kg2 25:5). But Bttcher has very properly defended the Chethib on the strength of Sa2 17:16, where the Keri has ערבות again, though עברות is the true reading (cf. Sa2 19:19). The "ferries of the desert" are the places where the Jordan could be crossed, the fords of the Jordan (Jos 2:7; Jdg 3:28).
Sa2 15:29
Zadok and Abiathar then returned to the city with the ark of God.