Genesis 17:13

17:13 They must indeed be circumcised, whether born in your house or bought with money. The sign of my covenant will be visible in your flesh as a permanent reminder.

Genesis 17:27

17:27 All the men of his household, whether born in his household or bought with money from a foreigner, were circumcised with him.

Genesis 23:18

23:18 as his property in the presence of the sons of Heth before all who entered the gate of Ephron’s city.