21 But, if he continues a day or two, he shall not be punished: for he is his property.
Exodus 21:21 Cross References - KJ2000
Leviticus 25:44-46
44 Both your male and female slaves, whom you shall have, shall be of the nations that are round about you; of them shall you buy male and female slaves.
45 Also of the children of the strangers that do sojourn among you, of them shall you buy, and of their families that are with you, whom they begat in your land: and they shall be your possession.
46 And you shall take them as an inheritance for your children after you, to inherit them for a possession; they shall be your slaves forever: but over your brethren the children of Israel, you shall not rule one over another with harshness.