Then he went out to the source of the water, and cast in the salt there, and said, "Thus says the LORD: "I have healed this water; from it there shall be no more death or barrenness."'
2 Kings 2:21
Surrounding context
2:20 And he said, "Bring me a new bowl, and put salt in it." So they brought it to him.
2:21 Then he went out to the source of the water, and cast in the salt there, and said, "Thus says the LORD: "I have healed this water; from it there shall be no more death or barrenness."'
2:22 So the water remains healed to this day, according to the word of Elisha which he spoke.