Exodus 4:5-7

Amplified Bible, Classic Edition

⁵ [This you shall do, said the Lord] that the elders may believe that the Lord, the God of their fathers, of Abraham, of Isaac, and of Jacob, has indeed appeared to you.

⁶ The Lord said also to him, Put your hand into your bosom. He put his hand into his bosom, and when he took it out, behold, his hand was leprous, as white as snow.

⁷ [God] said, Put your hand into your bosom again. So he put his hand back into his bosom, and when he took it out, behold, it was restored as the rest of his flesh.