Moreover, of the children of the strangers, that do sojourn among you,.... The uncircumcised sojourners as they are called in the Targums of Onkelos and Jonathan, proselytes of the gate, such of the nations round about who came and sojourned among them, being subject to the precepts given to the sons of Noah respecting idolatry, &c.
but were not circumcised, and did not embrace the Jewish religion:of them shall ye buy; for bondmen and bondmaids:and of their families that [are] with you, which they begat in your land; but, as the Targum of Jonathan adds, are not of the Canaanites; though the Jewish writers say, that one of the nations that lies with a Canaanitish woman, and begets a son of her, he may be bought for a servant; and so if a Canaanitish man lies with one of the nations, and begets a son of her, he may also be bought for a servant:and they shall be your possession; as servants, as bondmen and bondmaids, and be so for ever to them and their heirs, as follows.
Torat Cohanim apud Yalkut, par. 1. fol. 195.