Sahih Muslim
Sahih Muslim Book 004, Hadith Number 0739.
Hadith Section/Book: Sahih Muslim Sahih Muslim Book 04. Prayer
Chapter : Lying with one in menstruation above the waist wrapper.
Anas reported: Bilal was commanded (by the Holy Prophet) to repeat the phrases twice in Adhan, and once in Iqama.
Anas reported: Bilal was commanded (by the Holy Prophet) to repeat the phrases twice in Adhan, and once in Iqama.