Genesis 17:24-26

Revised Standard Version

²⁴ Abraham was ninety-nine years old when he was circumcised in the flesh of his foreskin. ²⁵ And Ish′mael his son was thirteen years old when he was circumcised in the flesh of his foreskin. ²⁶ That very day Abraham and his son Ish′mael were circumcised;