صحيح البخاري
Sahih Bukhari
كتاب الأذان
The Book of Adhan
بَابُ فَضْلِ صَلاَةِ الْفَجْرِ فِي جَمَاعَةٍ:
(31) Chapter. Superiority of the Fajr (early morning) prayer in congregation.
Hadith 649
قَالَ شُعَيْبٌ : وَحَدَّثَنِي نَافِعٌa> ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ ، قَالَ : تَفْضُلُهَا بِسَبْعٍ وَعِشْرِينَ دَرَجَةً .
Narrated `Abdullah bin `Umar: The reward of the congregational prayer is twenty seven times greater (than that of the prayer offered by a person alone).
