Sahih Bukhari
Invocations
Volume: 008 / Book Number: 075 / Hadith Number: 357
Narrated Ibn 'Abbas:
Allah's Apostle used to say at a time of distress, "La ilaha illal-lahu Rabbul-l-'arsh il-'azim, La ilaha illallahu Rabbu-s-samawati wa Rabbu-l-ard, Rabbu-l-'arsh-il-K