Joshua 6:17-19

But the city and everything in it are set apart to the LORD for destruction. Only Rahab the prostitute and everyone with her in the house will live, because she hid the messengers we sent. But keep yourselves from the things set apart, or you will be set apart for destruction. If you take any of those things, you will set apart the camp of Israel for destruction and make trouble for it. For all the silver and gold, and the articles of bronze and iron, are dedicated to the LORD and must go into the LORD’s treasury.”