Deuteronomy 20:10-15

10Before you start to attack a city, you must offer peace to the people who live there. Tell them what they must do to stop you attacking them.

11If they agree, they will open the city's gates to let you go in. Then all the people in the city will become your slaves, to do hard work for you.

12But they may refuse to agree. They may start to fight against you. If they do that, you must put your soldiers all around the city.

13The Lord your God will give the city to you. Then you must kill all the men there.

14But you can take for yourselves the women, the children, the animals and other valuable things in the city. You can take all these things from your enemies that God gives to you.

15You must do this to all the cities that are far away from you. But it is different for the cities that belong to the nations of Canaan where you will live.