2 Kings 3:16-20 (KJV)

16 And Elisha said, Thus saith the LORD, Make this valley full of ditches.

17 For thus saith the LORD, Ye shall not see wind, neither shall ye see rain; yet that valley shall be filled with water, that ye may drink, both ye, and your cattle, and your beasts. 18 And this is but a light thing in the sight of the LORD: he will deliver the Moabites also into your hand. 19 And ye shall smite every fenced city, and every choice city, and shall fell every good tree, and stop all wells of water, and mar every good piece of land with stones. 20 And it came to pass in the morning, when the meat offering was offered, that, behold, there came water by the way of Edom, and the country was filled with water.