Exodus 4:1-6

1 Then Moses answered the Lord, "But suppose the Israelites do not believe me and will not listen to what I say. What shall I do if they say that you did not appear to me?"
2 So the Lord asked him, "What are you holding?" "A walking stick," he answered.
3 The Lord said, "Throw it on the ground." When Moses threw it down, it turned into a snake, and he ran away from it.
4 Then the Lord said to Moses, "Reach down and pick it up by the tail." So Moses reached down and caught it, and it became a walking stick again.
5 The Lord said, "Do this to prove to the Israelites that the Lord, the God of their ancestors, the God of Abraham, Isaac, and Jacob, has appeared to you."
6 The Lord spoke to Moses again, "Put your hand inside your robe." Moses obeyed; and when he took his hand out, it was diseased, covered with white spots, like snow.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.