'Worthless' in the Bible

Their land is full of worthless idols; they worship the product of their own hands, what their own fingers have fashioned.

The worthless idols will be completely eliminated.

All who form idols are nothing; the things in which they delight are worthless. Their witnesses cannot see; they recognize nothing, so they are put to shame.

Who forms a god and casts an idol that will prove worthless?