Deuteronomy 20:10-15

10“When you approach a city to fight against it, you shall 1offer it terms of peace.

11If it 2agrees to make peace with you and opens to you, then all the people who are found in it shall become your 3forced labor and shall serve you.

12However, if it does not make peace with you, but makes war against you, then you shall besiege it.

13When the Lord your God gives it into your hand, 4you shall strike all the 5men in it with the edge of the sword.

14Only the women and the children and 6the animals and all that is in the city, all its spoil, you shall take as booty for yourself; and you shall 7use the spoil of your enemies which the Lord your God has given you.

15Thus you shall do to all the cities that are very far from you, which are not of the cities of these nations 8nearby.