Elisha purifies water
Elisha was told that the water in Jericho was bad. He threw salt in it and purified it.
Key passages
2 Ki 2:19–22

The men of the city said to Elisha, “Please now, the location of the city is good, as my master can see, but the water is bad and the land unproductive.” So he said, “Bring me a new bowl and put salt in it.” So they brought it to him. Then he went out to the spring of waters and threw the salt …

See also
Important Things