2 Kings 3:14-16

14 And Elisha said, As the LORD of hosts liveth, before whom I stand, surely, were it not that I regard the presence of Jehoshaphat the king of Judah, I would not look toward thee, nor see thee.
15 But now bring me a minstrel. And it came to pass, when the minstrel played, that the hand of the LORD came upon him.
16 And he said, Thus saith the LORD, Make this valley full of ditches.