Hadith 729
´It was narrated that Anas bin Malik said:` "They looked for something by means of which they could call out informing of (the time of) the prayer. Then Bilal was commanded to say the phrases of the Adhan twice and the phrases of the Iqamah once."
Hadith 730
´It was narrated that Anas said:` "Bilal was commanded to say the phrases of the Adhan twice and the phrases of the Iqamah once."
Hadith 731
´'Abdur-Rahman bin Sa'd bin 'Ammar bin Sa'd narrated (from his great-grandfather of the Messenger of Allah) that:` In the Adhan of Bilal, the phrases were two by two, and in his Iqamah they were said once.
Hadith 732
´It was narrated that Abu Rafi' said:` "I saw Bilal calling the Adhan in fron of Allah's Messenger, (saying the phrases) two by two, and saying each phrase once in the Iqamah."