'Foreigner' in the Bible

Every male among you who is eight days old shall be circumcised throughout your generations, [including] a servant whether born in the house or one who is purchased with [your] money from any foreigner, who is not of your descendants.

All the men [servants] of his household, both those born in the house and those purchased with money from a foreigner, were circumcised along with him [as the sign of God’s covenant with Abraham].