Sahih Muslim Book 4, Hadith Number 739.
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.