Deuteronomy 20:11

7What man is there who has pledged to be married to a wife, and has not taken her? Let him go and return to his house, lest he die in the battle, and another man take her.”

8The officers shall speak further to the people, and they shall say, “What man is there who is fearful and faint-hearted? Let him go and return to his house, lest his brother’s heart melt as his heart.”

9It shall be, when the officers have finished speaking to the people, that they shall appoint captains of armies at the head of the people.

10When you draw near to a city to fight against it, then proclaim peace to it.

11It shall be, if it gives you answer of peace and opens to you, then it shall be that all the people who are found therein shall become forced laborers to you, and shall serve you.

12If it will make no peace with you, but will make war against you, then you shall besiege it.

13When the LORD your God delivers it into your hand, you shall strike every male of it with the edge of the sword;

14but the women, the little ones, the livestock, and all that is in the city, even all its plunder, you shall take for plunder for yourself. You may use the plunder of your enemies, which the LORD your God has given you.

15Thus you shall do to all the cities which are very far off from you, which are not of the cities of these nations.