Bible Verses About Miracles: Were evidences of a divine commission

Moses answered, and said: They will not believe me, nor hear my voice, but they will say: The Lord hath not appeared to thee.

Then he said to him: What is that thou holdest in thy hand? He answered: A rod.

And the Lord said: Cast it down upon the ground. He cast it down, and it was turned into a serpent, so that Moses fled from it.

And the Lord said: Put out thy hand, and take it by the tail. He put forth his hand, and took hold of it, and it was turned into a rod.

That they may believe, saith he, that the Lord God of their fathers, the God of Abraham, the God of Isaac, and the God of Jacob, hath appeared to thee.

But they going forth preached every where: the Lord working withal, and confirming the word with signs that followed.