2 Kings 2:16-22 KJV
And they said unto him, Behold now, there be with thy servants fifty strong men; let them go, we pray thee, and seek thy master: lest peradventure the Spirit of the Lord hath taken him up, and cast him upon some mountain, or into some valley. And he said, Ye shall not send.  And when they urged him till he was ashamed, he said, Send. They sent therefore fifty men; and they sought three days, but found him not.  And when they came again to him, (for he tarried at Jericho,) he said unto them, Did I not say unto you, Go not?  And the men of the city said unto Elisha, Behold, I pray thee, the situation of this city is pleasant, as my lord seeth: but the water is naught, and the ground barren.  And he said, Bring me a new cruse, and put salt therein. And they brought it to him.  And he went forth unto 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 thence any more death or barren land .  So the waters were healed unto this day, according to the saying of Elisha which he spake.