Allah Subhanahu wa Ta'ala says (Qur'an Translation): Fir'aun (Pharaoh) said (sarcastically): And what is the Rabb of the Worlds? Musa 'Alaihis Salam said: The Rabb of the heavens and the earth, and all that is between them, if you had but sure belief. Fir'aun said to those around him: Did you hear (what nonsensical talk)? (But Musa continued with the praises of Allah and) said: Your Rabb and the Rabb of your fathers. Fir'aun said: Lo! Your messenger who has been sent to you is indeed a madman! (But) Musa (went on and) said: Rabb of the East and the West, and all that is between them, if you but use your reason. (Ash-Shu'ara' 26: 23-28)
