Leviticus 19:19-20

19“You are to keep my statutes. Do not crossbreed two different kinds of your livestock, sow your fields with two kinds of seed, or put on a garment made of two kinds of material.

20“If a man has sexual intercourse with a woman who is a slave designated for another man, but she has not been redeemed or given her freedom, there must be punishment. They are not to be put to death, because she had not been freed.