Hadith 336

Narrated 'Ubai bin Ka'b (RA): Allah's Messenger (ﷺ) said: "A man's prayer offered with another man is purer than his prayer which he offers alone, and his prayer with two men is purer than his prayer with one and if they are more (in number), it is more beloved to Allah, the Mighty the Majestic." [Reported by Abu Dawud and an-Nasa'i. And Ibn Hibban graded it Sahih (authentic)].