II Kings 2:19-22

¹⁹Then the men of the city said to Elisha, “Behold now, the situation of this city is pleasant, as my lord sees; but the water is bad and the land is unfruitful.” ²⁰He said, “Bring me a new jar, and put salt in it.” So they brought it to him. ²¹He went out to the spring of water and threw salt in it and said, “Thus says the Lord, ‘I have purified these waters; there shall not be from there death or unfruitfulness any longer.’” ²²So the waters have been purified to this day, according to the word of Elisha which he spoke.