Genesis 17:26 in the King James Version
In the selfsame day was Abraham circumcised, and Ishmael his son.
Context
25 Ishmael, his son, was thirteen years old when he was circumcised in the flesh of his foreskin.
26 In the same day both Abraham and Ishmael, his son, were circumcised.
27 All the men of his house, those born in the house, and those bought with money from a foreigner, were circumcised with him.