حَدَّثَنَا مُحَمَّدُ بْنُ سَلَمَةَ الْمُرَادِيُّ، حَدَّثَنَا ابْنُ وَهْبٍ، عَنْ يُونُسَ، عَنِ ابْنِ شِهَابٍ، أَخْبَرَنِي السَّائِبُ بْنُ يَزِيدَ،أَنَّ الأَذَانَ، كَانَ أَوَّلُهُ حِينَ يَجْلِسُ الإِمَامُ عَلَى الْمِنْبَرِ يَوْمَ الْجُمُعَةِ فِي عَهْدِ النَّبِيِّ صلى الله عليه وسلم وَأَبِي بَكْرٍ وَعُمَرَ - رضى الله عنهما - فَلَمَّا كَانَ خِلاَفَةُ عُثْمَانَ وَكَثُرَ النَّاسُ أَمَرَ عُثْمَانُ يَوْمَ الْجُمُعَةِ بِالأَذَانِ الثَّالِثِ فَأُذِّنَ بِهِ عَلَى الزَّوْرَاءِ فَثَبَتَ الأَمْرُ عَلَى ذَلِكَ ‏.‏

Al-Sa'ib b. Yazid said

During the time of the Prophet (ﷺ), Abu Bakr, and Umar, the call to prayer (adhan) on Friday was initially made when the imam sat on the pulpit. When the caliphate of Uthman came and the people increased in number, Uthman ordered a third call to prayer on Friday, and it was called out over the house of al-Zawra'. The matter remained established upon that.