1 Kings 13:3-5

3The same day, God's servant spoke another message to warn Jeroboam. He said, ‘This is the sign to show that the Lord has decided to do this: You will see the altar break into two pieces. The ashes of the sacrifices that are on it will fall to the ground.’

4King Jeroboam heard the message that God's servant shouted against the altar at Bethel. As he stood there at the altar, the king pointed his hand at God's servant. He said, ‘Take hold of that man!’ But when he pointed with his hand, it suddenly became useless and he could not pull it back.

5Then the altar broke into two pieces and the ashes fell to the ground. That is what God's servant had said would happen, to show that he spoke with the Lord's authority.