C. F. Keil and Franz Delitzsch on Isaiah 42:17

Isa 42:17

In connection with this, the following v. declares what effect this double manifestation will produce among the heathen. “They fall back, are put deeply to shame, that trust in molten images, that say to the molten image, Thou art our God.” Bōsheth takes the place of an inf. intens.; cf., Hab 3:9. Jehovah’s glorious acts of judgment and salvation unmask the false gods, to the utter confusion of their worshippers. And whilst in this way the false religions fall, the redemption of Israel becomes at the same time the redemption of the heathen. The first half of this third prophecy is here brought to a close.