Sahih al-Bukhari 3639
Narrated Anas:
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.
حَدَّثَنِي مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا مُعَاذٌ، قَالَ حَدَّثَنِي أَبِي، عَنْ قَتَادَةَ، حَدَّثَنَا أَنَسٌ ـ رضى الله عنه ـ أَنَّ رَجُلَيْنِ، مِنْ أَصْحَابِ النَّبِيِّ صلى الله عليه وسلم خَرَجَا مِنْ عِنْدِ النَّبِيِّ صلى الله عليه وسلم فِي لَيْلَةٍ مُظْلِمَةٍ وَمَعَهُمَا مِثْلُ الْمِصْبَاحَيْنِ، يُضِيآنِ بَيْنَ أَيْدِيهِمَا، فَلَمَّا افْتَرَقَا صَارَ مَعَ كُلِّ وَاحِدٍ مِنْهُمَا وَاحِدٌ حَتَّى أَتَى أَهْلَهُ‏.‏