Genesis 17:23-25

New Century Version

²³ Then Abraham gathered Ishmael, all the males born in his camp, and the slaves he had bought. So that day Abraham circumcised every man and boy in his camp as God had told him to do. ²⁴ Abraham was ninety-nine years old when he was circumcised. ²⁵ And Ishmael, his son, was thirteen years old when he was circumcised.