Imam Sadiq [as] addressed a group of people and inquired why they annoyed the Messenger of Allah. Someone asked Imam how they did so, and he said: “Do you not know that your deeds are reported to him [the prophet]? When he observes a sin against Allah among them, he becomes displeased. Therefore do not hurt the Messenger of Allah, but make him pleased.”[i]

[i] Usul-I-Kafi, vol. 1, p. 219

Imam Ali ibn Musa al-Ridha, the eighth Imam, [a] said: “The excellence of the congregational prayer, comparing with solitary prayer, is one rak’at to two thousand rak’ats.”[i]

[i] Bihar-ul-Anwar, vol. 88, p. 4 & Wasa’il-ush Shi’ah, vol. 8, p. 290