Leviticus 19:20

Revised Standard Version

“If a man lies carnally with a woman who is a slave, betrothed to another man and not yet ransomed or given her freedom, an inquiry shall be held. They shall not be put to death, because she was not free;

Cross References

Galatians 4:22

For it is written that Abraham had two sons, one by a slave and one by a free woman.