Genesis 17:26

New American Bible - revised edition

Thus, on that same day Abraham and his son Ishmael were circumcised;

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Abram went as the Lord directed him, and Lot went with him. Abram was seventy-five years old when he left Haran.

and his son Ishmael was thirteen years old when the flesh of his foreskin was circumcised.

and all the males of his household, including the slaves born in his house or acquired with his money from foreigners, were circumcised with him.

I am prompt, I do not hesitate in observing your commandments.