(31) باب فَضْلِ صَلاَةِ الْفَجْرِ فِي جَمَاعَةٍ
Narrated Abu Musa:
The Prophet (ﷺ) said, "The people who get tremendous reward for the prayer are those who are farthest away (from the mosque) and then those who are next farthest and so on. Similarly one who waits to pray with the Imam has greater reward than one who prays and goes to bed. "
Reference: Sahih al-Bukhari 651
In-book reference: Book 10, Hadith 48
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 11, Hadith 623