2 Kings 2:18-22

18And when they came again to him, (for he tarried at Jericho,) he said to them, Did I not say to you, Go not?

19And the men of the city said to Elisha, Behold, I pray thee, the situation of this city is pleasant, as my lord seeth: but the water is bad, and the ground barren.1 20And he said, Bring me a new cruse, and put salt in it. And they brought it to him. 21And he went forth to the spring of the waters, and cast the salt in there, and said, Thus saith the LORD, I have healed these waters; there shall not be from there any more death or barren land . 22So the waters were healed to this day, according to the saying of Elisha which he spoke.