Exodus 4:2-4

2The Lord said to him, “What is that in your hand?” He said, a“A staff.” 3And he said, “Throw it on the ground.” So he threw it on the ground, and it became a serpent, and Moses ran from it. 4But the Lord said to Moses, “Put out your hand and catch it by the tail”—so he put out his hand and caught it, and it became a staff in his hand

Exodus 7:10

10So Moses and Aaron went to Pharaoh and did just as the Lord commanded. Aaron cast down his staff before Pharaoh and his servants, and it became a serpent.
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