2 Kings 2:15-22

When the sons of the prophets who were [watching] opposite at Jericho saw him, they said, “The spirit of Elijah rests on Elisha.” And they came to meet him and bowed down to the ground before him [in respect]. Then they said to Elisha, “Behold now, there are among your servants fifty strong men; please let them go and search for your master. It may be that the Spirit of the LORD has taken him up and cast him on some mountain or into some valley.” And he said, “You shall not send anyone.” But when they urged him until he was embarrassed [to refuse them], he said, “Send them.” So they sent fifty men, and they searched for three days but did not find Elijah. They returned to Elisha while he was staying at Jericho; and he said to them, “Did I not tell you, ‘Do not go’?” Then the men of the city said to Elisha, “Look, this city is in a pleasant place, as my lord [Elisha] sees; but the water is bad and the land is barren.” He said, “Bring me a new jar, and put salt in it.” So they brought it to him. Then Elisha went to the spring of water and threw the salt in it and said, “Thus says the LORD: ‘I [not the salt] have purified and healed these waters; there shall no longer be death or barrenness because of it.’ ” So the waters have been purified to this day, in accordance with the word spoken by Elisha.