And Abraham took Ishmael his son, and all that were born in his house, and all that were bought with his money, every male among the men of Abraham's house; and circumcised the flesh of their foreskin in the selfsame day, as God had said unto him. (17:23)

And Abraham [was] ninety years old and nine, when he was circumcised in the flesh of his foreskin. (17:24)

And Ishmael his son [was] thirteen years old, when he was circumcised in the flesh of his foreskin. (17:25)

In the selfsame day was Abraham circumcised, and Ishmael his son. (17:26)