Then Moses answered, "But behold, they will not believe me or listen to my voice, for they will say, 'The LORD did not appear to you.'"
The LORD said to him, "What is that in your hand?" He said, "A rod."
And he said, "Cast it on the ground." So he cast it on the ground, and it became a serpent; and Moses fled from it.
But the LORD said to Moses, "Put out your hand, and take it by the tail" --so he put out his hand and caught it, and it became a rod in his hand--
"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."
Again, the LORD said to him, "Put your hand into your bosom." And he put his hand into his bosom; and when he took it out, behold, his hand was leprous, as white as snow.