Exodus 7:10-12,22
And Moses and Aaron went in to Pharaoh, and they did so as the LORD had commanded: and Aaron cast down his rod before Pharaoh, and before his servants, and it became a serpent.
Nave's Topical Index—AKJV

Exodus 8:7
And the magicians did so with their enchantments, and brought up frogs on the land of Egypt.
Nave's Topical Index—AKJV