2 Kings 2:9-10

When they had crossed, Elijah said to Elisha, “Ask what I shall do for you, before I am taken from you.” And Elisha said, “Please let there be a double portion of your spirit on me.” And he said, “You have asked a hard thing; yet, if you see me as I am being taken from you, it shall be so for you, but if you do not see me, it shall not be so.”