Exodus 4:4-6

Young's Literal Translation

⁴ And Jehovah saith unto Moses, `Put forth thy hand, and lay hold on the tail of it;' and he putteth forth his hand, and layeth hold on it, and it becometh a rod in his hand --

⁵ `-- so that they believe that Jehovah, God of their fathers, hath appeared unto thee, God of Abraham, God of Isaac, and God of Jacob.'

⁶ And Jehovah saith to him again, `Put in, I pray thee, thy hand into thy bosom;' and he putteth in his hand into his bosom, and he bringeth it out, and lo, his hand [is] leprous as snow;