Not graded
Mu‘allaq (without full chain) Sahih al-Bukhari 649
Narrator:Abdullāh ibn ‘Umar
قَالَ شُعَيْبٌ وَحَدَّثَنِي نَافِعٌ، 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).
Reported by Al-Bukhari (No. 649).