Sahih Bukhari
Oneness, Uniqueness of Allah (Tawheed)
Volume: 009 / Book Number: 093 / Hadith Number: 531
Narrated Jarir:
Allah's Apostle came out to us on the night of the full moon and said, "You will see your Lord on the Day of Resurrection as you see this (full moon) and you will have no difficulty in seeing Him."