2 Kings 2:19-23

Then 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.”

And he said, “Bring me a new jar, and put salt in it.” So they brought it to him.

Then 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.’ ”

So the waters have been purified to this day, in accordance with the word of Elisha which he spoke.

Now he went up from there to Bethel; and as he was going up by the road, some young boys came out from the city and ridiculed him and said to him, “Go up, you baldhead; go up, you baldhead!”