The LORD said to Moses and Aaron,
8. And the Lord spake. No wonder that Moses often repeats the same thing, because he wrote for persons of rude and dull minds. But it behooves us, lest we should be disgusted by his simple and popular style, diligently to examine how little we are inclined to be acute and earnest in our consideration of the works of God.
The first time that Moses made his application to Pharaoh, he produced his instructions only; now he is directed to produce his credentials, and does accordingly. 1. It is taken for granted that Pharaoh would challenge these demandants to work a miracle, that, by a performance evidently above the power of nature, they might prove their commission from the God of nature.
Commenting on Exodus 7:8-13
And the Lord spake unto Moses and unto Aaron,.... After he had given them their commission, and instructions to go to Pharaoh, and a little before they went in to him: saying, as follows.