Call to Prayers (Adhaan)

Bukhari :: Book 1 :: Volume 11 :: Hadith 635

Narrated Nafi':

Once on a very cold and stormy night, Ibn 'Umar pronounced the Adhan for the prayer and then said, "Pray in your homes." He (Ibn 'Umar) added. "On very cold and rainy nights Allah's Apostle used to order the Mu'adhdhin to say, 'Pray in your homes.' "