Genesis 17:11

¹¹He received the sign of circumcision, a seal of the righteousness of the faith which he had while he was in uncircumcision, that he might be the father of all those who believe, though they might be in uncircumcision, that righteousness might also be accounted to them.

¹⁶Circumcise therefore the foreskin of your heart, and be no more stiff-necked.

⁸He gave him the covenant of circumcision. So Abraham became the father of Isaac, and circumcised him the eighth day. Isaac became the father of Jacob, and Jacob became the father of the twelve patriarchs.

¹⁴David sent messengers to Ishbosheth, Saul’s son, saying, “Deliver me my wife Michal, whom I was given to marry for one hundred foreskins of the Philistines.”

⁴⁸When a stranger lives as a foreigner with you, and would like to keep the Passover to the LORD, let all his males be circumcised, and then let him come near and keep it. He shall be as one who is born in the land; but no uncircumcised person shall eat of it.

²⁵Saul said, “Tell David, ‘The king desires no dowry except one hundred foreskins of the Philistines, to be avenged of the king’s enemies.’” Now Saul thought he would make David fall by the hand of the Philistines. ²⁶When his servants told David these words, it pleased David well to be the king’s son-in-law. Before the deadline, ²⁷David arose and went, he and his men, and killed two hundred men of the Philistines. Then David brought their foreskins, and they gave them in full number to the king, that he might be the king’s son-in-law. Then Saul gave him Michal his daughter as wife.

³Joshua made himself flint knives, and circumcised the sons of Israel at the hill of the foreskins.

²⁵Then Zipporah took a flint, and cut off the foreskin of her son, and cast it at his feet; and she said, “Surely you are a bridegroom of blood to me.”