Acts 13:7 (KJV)

As they ministered to the Lord, and fasted, the Holy Ghost said, Separate me Barnabas and Saul for the work whereunto I have called them.

And when they had fasted and prayed, and laid their hands on them, they sent them away.

So they, being sent forth by the Holy Ghost, departed unto Seleucia; and from thence they sailed to Cyprus.

And when they were at Salamis, they preached the word of God in the synagogues of the Jews: and they had also John to their minister.

And when they had gone through the isle unto Paphos, they found a certain sorcerer, a false prophet, a Jew, whose name was Barjesus:

But Elymas the sorcerer (for so is his name by interpretation) withstood them, seeking to turn away the deputy from the faith.

Then Saul, (who also is called Paul,) filled with the Holy Ghost, set his eyes on him.

And said, O full of all subtilty and all mischief, thou child of the devil, thou enemy of all righteousness, wilt thou not cease to pervert the right ways of the Lord?

And now, behold, the hand of the Lord is upon thee, and thou shalt be blind, not seeing the sun for a season. And immediately there fell on him a mist and a darkness; and he went about seeking some to lead him by the hand.

Then the deputy, when he saw what was done, believed, being astonished at the doctrine of the Lord.