He gave a sign the same day, saying, “This is the sign that the Lord has spoken: The altar shall be torn down, and the ashes that are on it shall be poured out.”
When the king heard what the man of God cried out against the altar at Bethel, Jeroboam stretched out his hand from the altar, saying, “Seize him!” But the hand that he stretched out against him withered so that he could not draw it back to himself.
So Moses and Aaron went to Pharaoh and did as the Lord had commanded; Aaron threw down his staff before Pharaoh and his officials, and it became a snake.
This shall be the sign to you, says the Lord, that I am going to punish you in this place, in order that you may know that my words of disaster against you will surely be carried out: