2 Kings 5:14-17

Then went he down, and dipped himself seven times in the Jordan, according to the saying of the man of God; and his flesh came again like unto the flesh of a little child, and he was clean. And he returned to the man of God, he and all his company, and came, and stood before him; and he said, Behold now, I know that there is no God in all the earth, but in Israel: now therefore, I pray thee, take a present of thy servant. But he said, As Jehovah liveth, before whom I stand, I will receive none. And he urged him to take it; but he refused. And Naaman said, If not, yet, I pray thee, let there be given to thy servant two mules’ burden of earth; for thy servant will henceforth offer neither burnt-offering nor sacrifice unto other gods, but unto Jehovah.