"It is interesting to compare the condition of the concubine under Muslim law and under the Mosaic. Under the law of Moses, a concubine would generally be either a Hebrew girl bought of her father, or a Gentile captive taken in war. So that whilst the Muhammadan law forbids concubinage with a free woman, the Mosaic law permitted and legislated for it. See Exodus xxi.: "If a man sell his daughter to be a maid-servant, she shall not go out as men-servants do. If she please not her master who hath betrothed her to himself, then shall he let her be redeemed; to sell her unto a strange nation he shall have no power, seeing he hath dealt deceitfully with her." With regard to female slaves taken in war, the Mosaic law ruled. Deut. xxi. 10: "When thou goest to war against thine enemies, and the Lord thy God hath delivered them into thine hands, and thou hast taken them captive, and seest a beautiful woman, and hast a desire unto her, that thou wouldst have her to thy wife: then thou shalt bring her to thine home, &c... And it shall be if thou have no delight in her, then thou shalt let her go whither she will, but thou shall not sell her" &c."
January 1, 1970
https://en.wikiquote.org/wiki/The_Bible_and_slavery