Genesis 17:25-27

Young's Literal Translation

²⁵ and Ishmael his son [is] a son of thirteen years in the flesh of his foreskin being circumcised;

²⁶ in this self-same day hath Abraham been circumcised, and Ishmael his son;

²⁷ and all the men of his house -- born in the house, and bought with money from the son of a stranger -- have been circumcised with him.