Genesis 17:21-23

Young's Literal Translation

²¹ and My covenant I establish with Isaac, whom Sarah doth bear to thee at this appointed time in the next year;'

²² and He finisheth speaking with him, and God goeth up from Abraham.

²³ And Abraham taketh Ishmael his son, and all those born in his house, and all those bought with his money -- every male among the men of Abraham's house -- and circumciseth the flesh of their foreskin, in this self-same day, as God hath spoken with him.