Joshua 6:17-19

17Jericho and everything in it must be completely destroyed as an offering to the Lord. Only Rahab the prostitute and the others in her house will be spared, for she protected our spies.

18“Do not take any of the things set apart for destruction, or you yourselves will be completely destroyed, and you will bring trouble on the camp of Israel.

19Everything made from silver, gold, bronze, or iron is sacred to the Lord and must be brought into his treasury.”