The Messenger of Allah ﷺ said, "The reward of praying in congregation surpasses the reward of one of you praying alone by twenty-five times."
قال حدثنا إبراهيم بن أبي العباس حدثنا أبو أويس عن الزهري عن سعيد بن المسيب
عن رسول الله ﷺ قال فضل صلاة الجماعة على صلاة أحدكم وحده خمسة وعشرون جزءا
Its chain of transmission is sahih. It was mentioned previously at 7601, and it is similar to it in Bukhari 6/108, in the tafsir of His saying, "Indeed, the recitation of Fajr is witnessed" [Isra 17:78], and Abdul-Razzaq 1/522, number 2001.