Deuteronomy 21:10-17

New International Version

Marrying a Captive Woman

¹⁰ When you go to war against your enemies and the Lord your God delivers them into your hands^(A) and you take captives,^{(B) 11} if you notice among the captives a beautiful^(C) woman and are attracted to her,^(D) you may take her as your wife. ¹² Bring her into your home and have her shave her head,^(E) trim her nails ¹³ and put aside the clothes she was wearing when captured. After she has lived in your house and mourned her father and mother for a full month,^(F) then you may go to her and be her husband and she shall be your wife. ¹⁴ If you are not pleased with her, let her go wherever she wishes. You must not sell her or treat her as a slave, since you have dishonored her.^(G)

The Right of the Firstborn

¹⁵ If a man has two wives,^(H) and he loves one but not the other, and both bear him sons but the firstborn is the son of the wife he does not love,^{(I) 16} when he wills his property to his sons, he must not give the rights of the firstborn to the son of the wife he loves in preference to his actual firstborn, the son of the wife he does not love.^{(J) 17} He must acknowledge the son of his unloved wife as the firstborn by giving him a double^(K) share of all he has. That son is the first sign of his father’s strength.^(L) The right of the firstborn belongs to him.^(M)