Exodus 9:23

Moses. Beginning with the seventh plague Moses steps forward as the sole agent of God. When calling the representatives of the Israelites, Pharaoh still sent for both Moses and Aaron (v. 27; ch. 10:8) as the two with whom he had been dealing from the time the plagues began. But Moses had now become God’s spokesman in the presence of the king and executor of the divine judgments. By now he must have lost his timidity and fearfulness and become the dauntless champion for the cause of God that he remained till the close of his life.

Thunder and hail, and the fire. Although hail only had been predicted, lightning and thunder commonly accompany hailstorms in warm climates. The peculiar electrical display described here as fire running “along upon the ground” seems to have been something corresponding to “fireballs.”