Confounded be all they that serve graven images, that boast themselves of idols. Professor Cheyne transposes this verse and the next, but without any necessity. It is quite natural that the effect of the theophany on God's enemies should be noted first.
The effect is that they are "confounded," or rather, covered with shame. The display of real Divine power makes manifest the impotency of the idols, and puts their worshippers to the blush. Worship him, all ye gods.
The theophany is a call on the false gods to worship the true God.