2 Then the Lord asked him, "What is that in your hand?" "A shepherd's staff," Moses replied. 3 "Throw it down on the ground," the Lord told him. So Moses threw down the staff, and it turned into a snake! Moses jumped back. 4 Then the Lord told him, "Reach out and grab its tail." So Moses reached out and grabbed it, and it turned back into a shepherd's staff in his hand. 5 "Perform this sign," the Lord told him. "Then they will believe that the Lord, the God of their ancestors-the God of Abraham, the God of Isaac, and the God of Jacob-really has appeared to you."
Matthew Henry's Commentary on Exodus 4:2-5
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.