Charles Ellicott Commentary Isaiah 31:7

"For in that day they shall cast away every man his idols of silver, and his idols of gold, which your own hands have made unto you for a sin." — Isaiah 31:7 (ASV)

In that day every man shall cast away ... — The act is the same as that of Isaiah 2:20, but with a marked difference of motive: there it springs from the terror of despair, here from the repentance which is the ground of hope.