2 Kings 5:14-17

So he went down and dipped himself seven times in the Jordan, according to the word of the man of God, and his flesh was restored like the flesh of a little child, and he was clean. Then he returned to the man of God, he and all his company, and he came and stood before him. And he said, “Behold, I know that there is no God in all the earth but in Israel; so accept now a present from your servant.” But he said, “As the LORD lives, before whom I stand, I will receive none.” And he urged him to take it, but he refused. Then Naaman said, “If not, please let there be given to your servant two mule loads of earth, for from now on your servant will not offer burnt offering or sacrifice to any god but the LORD.