Genesis 17:23-25

New Catholic Bible

²³ Abraham therefore took Ishmael his son and all those born into his house and all those whom he had bought—all the males belonging to the household of Abraham—and he circumcised the flesh of their foreskins that same day, as the Lord had commanded him. ²⁴ Abraham was ninety-nine years old when he had the flesh of his foreskin circumcised. ²⁵ Ishmael, his son, was thirteen years old when the flesh of his foreskin was circumcised.