Genesis 17:21
But I will establish my covenant with Isaac, whom Sarah will bear to you at this set time next year.”
World English Bible (Public Domain)
In context
Before · Genesis 17:19–20
19God said, “No, but Sarah, your wife, will bear you a son. You shall call his name Isaac. I will establish my covenant with him for an everlasting covenant for his offspring after him. 20As for Ishmael, I have heard you. Behold, I have blessed him, and will make him fruitful, and will multiply him exceedingly. He will become the father of twelve princes, and I will make him a great nation.
21But I will establish my covenant with Isaac, whom Sarah will bear to you at this set time next year.”
After · Genesis 17:22–23
22When he finished talking with him, God went up from Abraham. 23Abraham took Ishmael his son, all who were born in his house, and all who were bought with his money: every male among the men of Abraham’s house, and circumcised the flesh of their foreskin in the same day, as God had said to him.