Joshua 6:18-19

But as for you, keep yourselves [away] from the things under the ban [which are to be destroyed], so that you do not covet them and take some of the things under the ban [for personal gain], and put the camp of Israel under the ban (doomed to destruction), and bring disaster upon it. All the silver and gold and articles of bronze and iron are holy (consecrated) to the LORD; they shall go into the treasury of the LORD.”