سلسله احاديث صحيحه
Silsilat al-Ahadith al-Sahihah
الاذان و الصلاةBook of Adhan and Prayer
Virtue of congregational prayer
Hadith 527
ـ (صلاةُ الرّجلِ في جماعةٍ تزيدُ على صَلاتِهِ وحدَه خمْساً وعشرينَ دَرجَةً، وإنْ صلاها بأرضِ فلاةٍ، فأتمّ وُضوءها وركوعَها وسجودَها؛ بلغتْ صلاتُه خمسينَ درجةٍ) .
It is narrated from Sayyiduna Abu Sa'id Khudri, may Allah be pleased with him, who says that the Messenger of Allah, peace and blessings be upon him, said: "A man's prayer with the congregation is twenty-five degrees greater than his prayer alone, and if he is in a deserted wilderness and performs ablution, bowing, and prostration in a complete manner, then his prayer reaches up to fifty degrees."
