Genesis 17:23

23 On that very day Abraham circumcised his son Ishmael. He also circumcised every male who was born in his house or bought with his money. He did exactly as God had told him.

Genesis 17:23 In-Context

21 "But I will establish my covenant with Isaac. By this time next year, Sarah will have a son by you."
22 When he had finished speaking with Abraham, God left him.
23 On that very day Abraham circumcised his son Ishmael. He also circumcised every male who was born in his house or bought with his money. He did exactly as God had told him.
24 Abraham was 99 years old when he was circumcised.
25 His son Ishmael was 13.
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