2 Kings 2:19-22

One day the men of the city said to Elisha, “You can see for yourself, master, how well our city is located. But the water is polluted and nothing grows.” He said, “Bring me a brand-new bowl and put some salt in it.” They brought it to him. He then went to the spring, sprinkled the salt into it, and proclaimed, “GOD’s word: I’ve healed this water. It will no longer kill you or poison your land.” And sure enough, the water was healed—and remains so to this day, just as Elisha said.