Old Testament

The Book of Exodus: Chapter 4:1-9

Then Moses answered and said, "But suppose they will not believe me or listen to my voice; suppose they say, 'The Lord has not appeared to you.' " So the Lord said to him, "What is that in your hand?" He said, "A rod." And He said, "Cast it on the ground." So he cast it on the ground, and it became a serpent; and Moses fled from it. Then the Lord said to Moses, "Reach out your hand and take it by the tail" (and he reached out his hand and caught it, and it became a rod in his hand), "that they may believe that the Lord God of their fathers, the God of Abraham, the God of Isaac, and the God of Jacob, has appeared to you." Furthermore the Lord said to him, "Now put your hand in your bosom." And he put his hand in his bosom, and when he took it out, behold, his hand was leprous, like snow. And He said, "Put your hand in your bosom again." So he put his hand in his bosom again, and drew it out of his bosom, and behold, it was restored like his other flesh. "Then it will be, if they do not believe you, nor heed the message of the first sign, that they may believe the message of the latter sign. And it shall be, if they do not believe even these two signs, or listen to your voice, that you shall take water from the river and pour it on the dry land. And the water which you take from the river will become blood on the dry land."

New Testament

The Book of Acts: Chapter 23:11-22

 But the following night the Lord stood by him and said, "Be of good cheer, Paul; for as you have testified for Me in Jerusalem, so you must also bear witness at Rome." And when it was day, some of the Jews banded together and bound themselves under an oath, saying that they would neither eat nor drink till they had killed Paul. Now there were more than forty who had formed this conspiracy. They came to the chief priests and elders, and said, "We have bound ourselves under a great oath that we will eat nothing until we have killed Paul Now you, therefore, together with the council, suggest to the commander that he be brought down to you tomorrow, as though you were going to make further inquiries concerning him; but we are ready to kill him before he comes near." So when Paul's sister's son heard of their ambush, he went and entered the barracks and told Paul. Then Paul called one of the centurions to him and said, "Take this young man to the commander, for he has something to tell him." So he took him and brought him to the commander and said, "Paul the prisoner called me to him and asked me to bring this young man to you. He has something to say to you." Then the commander took him by the hand, went aside and asked privately, "What is it that you have to tell me? And he said, "The Jews have agreed to ask that you bring Paul down to the council tomorrow, as though they were going to inquire more fully about him. But do not yield to them, for more than forty of them lie in wait for him, men who have bound themselves by an oath that they will neither eat nor drink till they have killed him; and now they are ready, waiting for the promise from you. So the commander let the young man depart, and commanded him, "Tell no one that you have revealed these things to me."