Sahih al-Bukhari Book 61, Hadith 143
Once two men from the companions of Allah's Messenger (ﷺ) went out of the house of the Prophet (ﷺ) on a very
dark night. They were accompanied by two things that resembled two lamps lighting the way in front
of them, and when they parted, each of them was accompanied by one of those two things (lamps) till
they reached their homes.