2 Kings 2:19-22

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