Leviticus 19:20
And whosoever lieth carnally with a woman, that is a bondmaid, betrothed to an husband, and not at all redeemed, nor freedom given her; she shall be scourged; they shall not be put to death, because she was not free.
Galatians 4:22
For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman.