Could not stand before Moses, as they hitherto had done, both as spies and as adversaries; for though their understandings were convinced of God's hand and infinite power, yet their hearts were not changed; but for their worldly interest they persisted to rebel against their light., and therefore are justly plagued. It was no favour to Pharaoh that the plague was not upon him, but only a reservation to a greater mischief, as it follows.
Related Commentaries of Exodus 9:11
Exodus 9:11
11 And the magicians could not stand before Moses because of the boils; for the boil was upon the magicians, and upon all the Egyptians.