2 Kings 2.12- 22
Then [Elisha] took hold of his own clothes and rent them in two pieces. And he took up the mantle of Elijah that had fallen from him, and went back and stood on the bank of the Jordan. Then he took the mantle of Elijah that had fallen from him, and struck the water, saying, "Where is the the Lord, the God of Elijah?!" And when he had struck the water, the water was parted from one side to the other; and Elisha went over.
Now when the sons of the prophets who were at Jericho saw him over against them, they said, "The spirit of Elijah rests on Elisha." And they came to meet him, and bowed to the ground before him. And they said to him, "Behold, now, there are with your servants fifty strong young men; pray, let them go and seek your master; it may be that the Spirit of the Lord has caught him up and cast him upon some mountain or into some valley."
And he said, "You shall not send." But when they had urged him till he was ashamed, he said, "Send."
They sent therefore fifty men; and for three days they sought him but did not find him.
And they came back to him, while he tarried at Jericho; and he said to them, "Did I not say to you, Do not go?"
Now the men of the city said to Elisha, "Behold, the situation of the city is pleasant, as my lord sees; but the water is bad and the land is unfruitful."
He said, "Bring me a little bowl, and put salt in it." So they brought it to him. Then he went to the spring of water and threw salt in it, and said, "Thus says the Lord, I have made this water wholesome. Henceforth neither death nor miscarriage shall come from it." So the water has been wholesome to this day, according to the word which Elisha spoke.