Exodus 4:3-5

New Century Version

³ The Lord said, “Throw it on the ground.”

So Moses threw it on the ground, and it became a snake. Moses ran from the snake, ⁴ but the Lord said to him, “Reach out and grab the snake by its tail.” When Moses reached out and took hold of the snake, it again became a stick in his hand. ⁵ The Lord said, “This is so that the Israelites will believe that the Lord appeared to you. I am the God of their ancestors, the God of Abraham, the God of Isaac, and the God of Jacob.”