Deuteronomy 21:10-17

10“Suppose you go out to war against your enemies and the Lord your God hands them over to you, and you take some of them as captives.

11And suppose you see among the captives a beautiful woman, and you are attracted to her and want to marry her.

12If this happens, you may take her to your home, where she must shave her head, cut her nails,

13and change the clothes she was wearing when she was captured. She will stay in your home, but let her mourn for her father and mother for a full month. Then you may marry her, and you will be her husband and she will be your wife.

14But if you marry her and she does not please you, you must let her go free. You may not sell her or treat her as a slave, for you have humiliated her.

15“Suppose a man has two wives, but he loves one and not the other, and both have given him sons. And suppose the firstborn son is the son of the wife he does not love.

16When the man divides his inheritance, he may not give the larger inheritance to his younger son, the son of the wife he loves, as if he were the firstborn son.

17He must recognize the rights of his oldest son, the son of the wife he does not love, by giving him a double portion. He is the first son of his father’s virility, and the rights of the firstborn belong to him.