17:17 Then Abraham fell upon his face, and laughed, and said in his
heart, Shall a child be born unto him that is an hundred years old?
and shall Sarah, that is ninety years old, bear? 17:18 And Abraham
said unto God, O that Ishmael might live before thee! 17:19 And God
said, Sarah thy wife shall bear thee a son indeed; and thou shalt call
his name Isaac: and I will establish my covenant with him for an
everlasting covenant, and with his seed after him.

17:20 And as for Ishmael, I have heard thee: Behold, I have blessed
him, and will make him fruitful, and will multiply him exceedingly;
twelve princes shall he beget, and I will make him a great nation.

17:21 But my covenant will I establish with Isaac, which Sarah shall
bear unto thee at this set time in the next year.

17:22 And he left off talking with him, and God went up from Abraham.

17:23 And Abraham took Ishmael his son, and all that were born in his
house, and all that were bought with his money, every male among the
men of Abraham's house; and circumcised the flesh of their foreskin in
the selfsame day, as God had said unto him.

17:24 And Abraham was ninety years old and nine, when he was
circumcised in the flesh of his foreskin.

17:25 And Ishmael his son was thirteen years old, when he was
circumcised in the flesh of his foreskin.

17:26 In the selfsame day was Abraham circumcised, and Ishmael his
son.