Deuteronomy 21:9-11

New Century Version

⁹ Then you will have removed from yourselves the guilt of murdering an innocent person, because you will be doing what the Lord says is right.

Captive Women as Wives

¹⁰ When you go to war against your enemies, the Lord will help you defeat them so that you will take them captive. ¹¹ If you see a beautiful woman among the captives and are attracted to her, you may take her as your wife.