Exodus 4:2-9

2The Lord said to him, "What is that in your hand?" He said, "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—

5"that they may believe that the Lord, the God of their fathers, the God of Abraham, the God of Isaac, and the God of Jacob, has appeared to you."

6Again, the Lord said to him, "Put your hand inside your cloak." And he put his hand inside his cloak, and when he took it out, behold, his hand was leprous like snow.

7Then God said, "Put your hand back inside your cloak." So he put his hand back inside his cloak, and when he took it out, behold, it was restored like the rest of his flesh.

8"If they will not believe you," God said, "or listen to the first sign, they may believe the latter sign.

9If they will not believe even these two signs or listen to your voice, you shall take some water from the Nile and pour it on the dry ground, and the water that you shall take from the Nile will become blood on the dry ground."