Genesis 17:21-23

Complete Jewish Bible

²¹ But I will establish my covenant with Yitz’chak, whom Sarah will bear to you at this time next year.” ²² With that, God finished speaking with Avraham and went up from him.

²³ Avraham took Yishma‘el his son, all the slaves born in his house and all who had been bought with his money, every male among the people in Avraham’s household, and circumcised the flesh of their foreskin that very day, just as God had said to him.