Exodus 4:3-4

3Then He said, “Throw it on the ground.” So Moses threw it on the ground, and it became a [living] serpent [like the royal symbol on the crown of Pharaoh]; and Moses ran from it.

4But the Lord said to Moses, “Reach out your hand and grasp it by the tail.” So he reached out his hand and caught it, and it became a staff in his hand—