Genesis 39:19

This was the second time Joseph became imprisoned while faithfully doing the right thing. They deceptively used his clothing as false evidence (compare 37:23–24, 31–33).

Joseph was honest and faithful in his work for Potiphar. This is very different from Judah, who failed morally (chapter 38). God was with Joseph (39:2–3, 21, 23). He helped Joseph succeed and become a blessing to others (see study notes on 12:1–9; 28:16–22), even while Joseph was a slave and later in prison.

Then she called unto the men of her house--Disappointed and affronted, she vowed revenge and accused Joseph, first to the servants of the house, and on his return to her lord.

See, he hath brought in an Hebrew . . . to mock us--an affected and blind aspersion of her husband for keeping in his house an Hebrew, the very abomination of Egyptians.

Here is, 1. Joseph wronged by his master. He believed the accusation, and either Joseph durst not make his defence by telling the truth, as it would reflect too much upon his mistress, or his master would not hear it, or would not believe it, and there is no remedy, he is condemned to perpetual imprisonment, Gen 39:19, Gen 39:20. God restrained his wrath, else he had put him to death; and that wrath which imprisoned him God made to turn to his praise, in order to which Providence so disposed that he should be shut up among the king's prisoners, the state-prisoners. Potiphar, it is likely, chose that prison because it was the worst; for there the iron entered into the soul (Psa 105:18), but God designed to pave the way to his enlargement. He was committed to the king's prison, that he might thence be preferred to the king's person. Note, Many an action of false imprisonment will, in the great day, be found to lie against the enemies and persecutors of God's people. Our Lord Jesus, like Joseph here, was bound, and numbered with the transgressors. 2. Joseph owned and righted by his God, who is, and will be, the just and powerful patron of oppressed innocence. Joseph was at a distance from all his friends and relations, had not them with him to comfort him, or to minister to him, or to mediate for him; but the Lord was with Joseph, and showed him mercy, Gen 39:21. Note, (1.) God despises not his prisoners, Psa 69:33. No gates nor bars can shut out his gracious presence from his people; for he has promised that he will never leave them. (2.) Those that have a good conscience in a prison have a good God there. Integrity and uprightness qualify us for the divine favour, wherever we are. Joseph is not long a prisoner before he becomes a little ruler even in the prison, which is to be attributed, under God, [1.] To the keeper's favour. God gave him favour in the sight of the keeper of the prison. Note, God can raise up friends for his people even where they little expect to find them, and can make them to be pitied even of those that carry them captive, Psa 106:46. [2.] To Joseph's fitness for business. The keeper saw that God was with him, and that every thing prospered under his hand; and therefore entrusted him with the management of the affairs of the prison, Gen 39:22, Gen 39:23. Note, Wisdom and virtue will shine in the narrowest spheres. A good man will do good wherever he is, and will be a blessing even in bonds and banishment; for the Spirit of the Lord is not bound nor banished, witness St. Paul, Phi 1:12, Phi 1:13.

When his master heard the words of his wife. Seeing that a color so probable was given to the transaction, there is no wonder that jealousy, the motions of which are exceedingly vehement and ardent, should so far have prevailed with Potiphar, as to cause him to credit the calumnies of his wife. Yet the levity with which he instantly thrust a servant, whom he had found prudent and honest, into prison, without examining the cause, cannot be excused. He ought certainly to have been less under the influence of his wife. And, therefore, he received the just reward of his too easy folly, by cherishing with honor, a harlot in the place of a wife, and by almost performing the office of a pander. This example is useful to all; yet husbands especially are taught that they must use prudence, lest they should be carried rashly hither and thither, at the will of their wives. And, truly, since we everywhere see that they who are too obsequious to their wives are held up to ridicule; let us know that the folly of these men is condemned by the just judgment of God, so that we may learn to pray for the spirit of gravity and moderation. There is no doubt that Moses expressly condemns the rashness of Potiphar, in becoming inflamed against Joseph, as soon as he had heard his wife, and in giving the reins to his indignation, just as if the guilt of Joseph had been proved; for thus all equity is excluded, no just defense is allowed, and finally, the true and accurate investigation of the cause is utterly rejected. But it may be asked, How could the jealousy of Potiphar be excited, since Moses before has said that he was an eunuch? [148] The solution of the question is easy; they were accustomed to be called eunuchs in the East, not only who were so really, but who were satraps and nobles. Wherefore, this name is of the same force as if Moses had said that he was one of the chief men of the court. [149]

He hath brought in a Hebrew unto us - Potiphar's wife affects to throw great blame on her husband, whom we may reasonably suppose she did not greatly love. He hath brought in - he hath raised this person to all his dignity and eminence, to give him the greater opportunity to mock us. לפחק letsachek, here translated to mock, is the same word used in Gen 26:8, relative to Isaac and Rebekah; and is certainly used by Potiphar's wife in Gen 39:17, to signify some kind of familiar intercourse not allowable but between man and wife.

And it came to pass, when his master heard the words of his wife,.... The story she related concerning Joseph, which was her own invention, and a lie:

which she spake unto him, saying, after this manner did thy servant to me; attempting to violate her chastity, as she pretended:

that his wrath was kindled; that is, against Joseph, without strictly examining her words, which they would not bear, her story being but ill put together, and without hearing Joseph's defence.

Joseph in Prison. - Potiphar was enraged at what he heard, and put Joseph into the prison where (אשׁר for שׁם אשׁר, Gen 40:3 like Gen 35:13) the king's prisoners (state-prisoners) were confined. הסּהר בּית: lit., the house of enclosure, from סהר, to surround or enclose (ὀχύρωμα, lxx); the state-prison surrounded by a wall. This was a very moderate punishment. For according to Diod. Sic. (i. 78) the laws of the Egyptians were πικροὶ περὶ τῶν γυναιῶν νόμοι. An attempt at adultery was to be punished with 1000 blows, and rape upon a free woman still more severely. It is possible that Potiphar was not fully convinced of his wife's chastity, and therefore did not place unlimited credence in what she said.
(Note: Credibile est aliquod fuisse indicium, quo Josephum innocentem esse Potiphari constiteret; neque enim servi vita tanti erat ut ei parceretur in tam gravi delicto. Sed licet innocuum, in carcere tamen detinebat, ut uxoris honori et suo consuleret (Clericus). The chastity of Egyptian women has been in bad repute from time immemorial (Diod. Sic. i. 59; Herod. ii. 111). Even in the middle ages the Fatimite Hakim thought it necessary to adopt severe measures against their immorality (Bar-Hebraei, chron. p. 217), and at the present day, according to Burckhardt (arab. Sprichwrter, pp. 222, 227), chastity is "a great rarity" among women of every rank in Cairo.)
But even in that case it was the mercy of the faithful covenant God, which now as before (Gen 37:20.) rescued Joseph's life.