And the magicians did so with their enchantments, &c. By their secret wiles and juggling tricks: and brought up frogs upon the land of Egypt, that is, some few, as a proof of their art and skill, and to show that Moses and Aaron did but what they could do; but what they did either were only in appearance, deceiving the sight of Pharaoh and his people, or real frogs were brought to them by the help of devils, but not in such numbers: and besides, this was adding to the plague, and not diminishing it; had they done anything to the purpose, they should have removed it at once, or destroyed the frogs; but that they could not do, of which Pharaoh being sensible, he therefore entreated for the removal of them by Moses and Aaron. To this plague there seems to be some reference at the pouring out of the sixth vial, Rev 16:13.