10. Call to Prayers (Adhaan) - كتاب الأذان

31) Chapter: Superiority of the Fajr (early morning) prayer in congregation.

Narrated `Abdullah bin `Umar: The reward of the congregational prayer is twenty seven times greater (than that of the prayer offered by a person alone).

Reference: 649
English reference: Vol. 1, Book 11, Hadith 621
In-book reference: Book 10, Hadith 46
Grade: Sahih
Read this hadith from Darussalam Collection