Sahih al-Bukhari, 647

Narrated Abu Huraira:Allah's Messenger (ﷺ) said, "The reward of the prayer offered by a person in congregation is twenty five times greater than that of the prayer offered in one's house or in the market (alone). And this is because if he performs ablution and does it perfectly and then proceeds to the mosque with the sole intention of praying, then for every step he takes towards the mosque, he is upgraded one degree in reward and his one sin is taken off (crossed out) from his accounts (of deeds). When he offers his prayer, the angels keep on asking Allah's Blessings and Allah's forgiveness for him as long as he is (staying) at his Musalla. They say, 'O Allah! Bestow Your blessings upon him, be Merciful and kind to him.' And one is regarded in prayer as long as one is waiting for the prayer

Rapporté par Abu Huraira : Le Messager d’Allah (ﷺ) a dit : « La récompense de la prière faite en groupe est vingt-cinq fois plus grande que celle de la prière faite chez soi ou au marché (seul). Cela, parce que si quelqu’un fait ses ablutions correctement puis va à la mosquée avec l’intention de prier, chaque pas qu’il fait vers la mosquée lui élève d’un degré en récompense et efface un de ses péchés. Quand il prie, les anges demandent à Allah de lui accorder Sa bénédiction et Son pardon tant qu’il reste à sa place de prière. Ils disent : “Ô Allah ! Accorde-lui Tes bénédictions, sois miséricordieux et bienveillant envers lui.” Et on considère qu’il est en prière tant qu’il attend la prière. »