Genesis 17:27

King James Version (public domain)

Traditionally attributed to Moses · c. 13th century BC · The Pentateuch — Genesis, Exodus, Leviticus, Numbers, and Deuteronomy — is traditionally attributed to him

And all the men of his house, born in the house, and bought with money of the stranger, were circumcised with him.

Following Abraham's covenant with God regarding circumcision of all males in his household.

Context

25And Ishmael his son was thirteen years old, when he was circumcised in the flesh of his foreskin.

26In the selfsame day was Abraham circumcised, and Ishmael his son.

27And all the men of his house, born in the house, and bought with money of the stranger, were circumcised with him.