II Kings 2:7-9

And fifty men of the sons of the prophets went and stood facing them at a distance, while the two of them stood by the Jordan. Now Elijah took his mantle, rolled it up, and struck the water; and it was divided this way and that, so that the two of them crossed over on dry ground. And so it was, when they had crossed over, that Elijah said to Elisha, “Ask! What may I do for you, before I am taken away from you?” Elisha said, “Please let a double portion of your spirit be upon me.”