2 Kings 2:6-10

And Elijah said to him, “Please stay here, for the Lord has sent me to the Jordan.” But he said, “As surely as the Lord lives, and as you yourself live, I will not leave you.” So the two of them went on.

Now fifty men of the sons of the prophets went and stood opposite them at a distance, while the two of them stood by the Jordan.

And Elijah took his coat, folded it, and struck the waters, and they were divided here and there, so that the two of them crossed over on dry ground.

When they had crossed over, Elijah said to Elisha, “Ask me what I should do for you before I am taken from you.” And Elisha said, “Please let a double portion of your spirit be upon me.”

He said, “You have asked a hard thing. Nevertheless, if you see me when I am taken from you, it shall be so for you; but if not, it shall not be so.”