Exodus 7:12; Exodus 8:18; Exodus 9:11

12 For each man cast down his staff, and they became serpents. But Aaron's staff swallowed up their staffs.

18 The cmagicians tried by their secret arts to produce gnats, but they could not. So there were gnats on man and beast.

11 And wthe magicians could not stand before Moses because of the boils, for the boils came upon the magicians and upon all the Egyptians.