Joshua 6:17-18

17The city and all that is in it are to be devoted The Hebrew term refers to the irrevocable giving over of things or persons to the Lord, often by totally destroying them; also in verses 18 and 21. to the LORD . Only Rahab the prostitute and all who are with her in her house shall be spared, because she hid the spies we sent. 18But keep away from the devoted things, so that you will not bring about your own destruction by taking any of them. Otherwise you will make the camp of Israel liable to destruction and bring trouble on it.