Genesis 17:21-23

New International Version - UK

²¹ But my covenant I will establish with Isaac, whom Sarah will bear to you by this time next year.’ ²² When he had finished speaking with Abraham, God went up from him.

²³ On that very day Abraham took his son Ishmael and all those born in his household or bought with his money, every male in his household, and circumcised them, as God told him.