2 Kings 2:8-9

And Elijah took his mantle (coat) and rolled it up and struck the waters, and they were divided this way and that, so that the two of them crossed over on dry ground. And when they had crossed over, Elijah said to Elisha, “Ask what I shall do for you before I am taken from you.” And Elisha said, “Please let a double portion of your spirit be upon me.”