Genesis 17:21
But my covenant will I establish with Isaac, which Sarah shall bear unto you at this set time in the next year.
ā The Restored Word Bible
Context
19 And Elohim said, Sarah your wife shall bear you a son indeed; and you shall call his name Isaac: and I will establish my covenant with him for an everlasting covenant, with his seed after him.
20 And as for Ishmael, I have heard you: 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.
21 But my covenant will I establish with Isaac, which Sarah shall bear unto you at this set time in the next year.
22 And he left off talking with him, and Elohim went up from Abraham.
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 Elohim had said unto him.