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; 7 and He saith, 'Put back thy hand unto thy bosom;' and he putteth back his hand unto his bosom, and he bringeth it out from his bosom, and lo, it hath turned back as his flesh— 8 '—and it hath come to pass, if they do not give credence to thee, and hearken not to the voice of the first sign, that they have given credence to the voice of the latter sign. 9 'And it hath come to pass, if they do not give credence even to these two signs, nor hearken to thy voice, that thou hast taken of the waters of the River, and hast poured on the dry land, and the waters which thou takest from the River have been, yea, they have become—blood on the dry land.'
Matthew Henry's Commentary on Exodus 4:4-9
Commentary on Exodus 4:1-9
(Read Exodus 4:1-9)
Moses objects, that the people would not take his word, unless he showed them some sign. God gives him power to work miracles. But those who are now employed to deliver God's messages to men, need not the power to work miracles: their character and their doctrines are to be tried by that word of God to which they appeal. These miracles especially referred to the miracles of the Lord Jesus Christ. It belonged to Him only, to cast the power of the devil out of the soul, and to heal the soul of the leprosy of sin; and so it was for Him first to cast the devil out of the body, and to heal the leprosy of the body.