Exodus 3:20 - Exposition

I will stretch out my hand . To encourage Moses and the people, to support them in what was, humanly speaking, a most unequal contest, this important promise is made. It is a confirmation, and to some extent, an explanation of the pledge, already, given, "Certainly I will be with thee" ( Exodus 3:12 ). It shows how God would be with him— he would smite Egypt with all his wonders —what those would be was left obscure. He would come to his people's aid, and openly assert himself, and afflict and strike terror into their enemies-until at last even Pharaoh's stubborn spirit would be broken, and he would consent to let them go .