In mythology, Mara was the demon god of Earthly Desire and Death. When he heard that Prince Siddhartha was sitting under a tree trying to learn the secrets of death, rebirth, and the wheel of the cosmos, Mara sent his demon hoards across the land to find and tempt or destroy the prince. Their efforts failed, and the prince became Buddha.
JOHN: Let's dig under this temple and steal its treasures. KAREN: Are you crazy? JOHN: Karen, I'm a dwarf from a kingdom of miners, an archeologist's right hand and the king of thieves!!!!
Well with that being a Star Wars quote, George Lucas and Steven Spielberg can use each other’s quotes in their movies as references or “Easter eggs” as they call it.