Genesis 17:20

Ishmael was not in God’s plan. But Abraham prayed for Ishmael. (See verse 18.) And God gave to Ishmael a place in his plan. Ishmael’s *descendants would be a great nation. God had already made this promise to Hagar. (See Genesis 16:10 and the comment.)

v23 Then Abraham took Ishmael his son. He took all the slaves who were born in his house. He took all the slaves that he had bought with his money. He took every male person who was among the men of Abraham’s house. He *circumcised them on that same day, as God had told him to do. v24 Abraham was 99 years of age when they *circumcised him. v25 And Ishmael his son was 13 years of age when they *circumcised him. v26 On that same day they *circumcised Abraham and they *circumcised his son Ishmael. v27 And they *circumcised with him all the men in his house. They *circumcised with him those who were born in the house. And they *circumcised those whom Abraham had bought with money from a foreigner.