Silsilat al-Ahadith al-Sahihah

Sayyiduna Abdullah bin Umar bin Khattab (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "Indeed, Allah Almighty is pleased with the congregational prayer."

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: "The prayer in congregation is twenty-five times superior to the prayer of a person performed alone. The angels of the night and the day gather at the Fajr prayer."

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."