Adam Clarke on Deuteronomy 7:25

Thou shalt not desire the silver or gold that is on them - Some of the ancient idols were plated over with gold, and God saw that the value of the metal and the excellence of the workmanship might be an inducement for the Israelites to preserve them; and this might lead, remotely at least, to idolatry. As the idols were accursed, all those who had them, or any thing appertaining to them, were accursed also, Deu 7:26.