2 Kings 5:11

But Naaman was wroth, and went away, and said, Behold, I thought, He will surely come out to me, and stand, and call on the name of the LORD his God, and strike his hand over the place, and recover the leper.

Strike his hand over the place - i:e., wave it over the diseased parts of his body. It was anciently, and still continues to be, a very prevalent superstition in the East, that the hand of a king, or person of great reputed sanctity, touching, or waved over a sore, will heal it.