Genesis 17:26

New King James Version

That very same day Abraham was circumcised, and his son Ishmael;

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I made haste, and did not delay To keep Your commandments.

So Abram departed as the Lord had spoken to him, and Lot went with him. And Abram was seventy-five years old when he departed from Haran.

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

and all the men of his house, born in the house or bought with money from a foreigner, were circumcised with him.