Genesis 17:24-26

New Revised Standard Version, Anglicised

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