Deuteronomy 21:9

5 And the priests, the sons of Levi, shall come forward, for the LORD your God has chosen them to serve Him and pronounce blessings in His name and to give a ruling in every dispute and case of assault.

6 Then all the elders of the city nearest the victim shall wash their hands by the stream over the heifer whose neck has been broken,

7 and they shall declare, “Our hands did not shed this blood, nor did our eyes see it.

8 Accept this atonement, O LORD, for Your people Israel whom You have redeemed, and do not hold the shedding of innocent blood against them.” And the bloodshed will be atoned for.

9 So you shall purge from among you the guilt of shedding innocent blood, since you have done what is right in the eyes of the LORD.

10 When you go to war against your enemies and the LORD your God delivers them into your hand and you take them captive,

11 if you see a beautiful woman among them, and you desire her and want to take her as your wife,

12 then you shall bring her into your house. She must shave her head, trim her nails,

13 and put aside the clothing of her captivity. After she has lived in your house a full month and mourned her father and mother, you may have relations with her and be her husband, and she shall be your wife.

Read all of Deuteronomy 21