Genesis 17:24-26

Darby Translation

²⁴ And Abraham was ninety-nine years old when he was circumcised in the flesh of his foreskin.

²⁵ And Ishmael his son was thirteen years old when he was circumcised in the flesh of his foreskin.

²⁶ In the selfsame day was Abraham circumcised, and Ishmael his son;