Exodus 4:6-7

6The Lord furthermore said to him, “Now put your hand into your bosom.” So he put his hand into his bosom, and when he took it out, behold, his hand was 1leprous like snow.

7Then He said, “Put your hand into your bosom again.” So he put his hand into his bosom again, and when he took it out of his bosom, behold, 2it was restored like the rest of his flesh.