Isaiah 2:20

A man shall cast his idols of silver... — The picture of the earthquake is still continued. The men who have taken refuge in the caves fling away the idols, that they have found powerless to help them, to the moles and bats which had their dwelling there. It is perhaps significant that the animals thus named were proverbial for their blindness and love of darkness. Such, the prophet seems to say, were the fit custodians of the idols whom none could worship except those that hated the light and were spiritually blind.

Which they made each one for himself. — Better, which they (the carvers of the idol) made for him (the worshipper).