Larry Lawyer and Dan Doctor are golfing buddies. Paul Patient was hit by a car and taken to the hospital were Dan Doctor treated him. Paul Patient mentioned that he had to find a lawyer to represent him in a lawsuit against the driver of the car that hit him. Dan Doctor called Larry Lawyer and said, "Hey, I have a great client for you. Give me 10% of your fee and I will send him your way." Larry Lawyer agreed. Is the arrangement between Larry Lawyer and Dan Doctor permissible for Larry Lawyer?