There was no other mu'adhdhin (pronouncer) of the Messenger of Allah ﷺ except Bilal. The narrator then reported the tradition to the same effect.
لَمْ يَكُنْ لِرَسُولِ اللَّهِ ﷺ إِلاَّ مُؤَذِّنٌ وَاحِدٌ بِلاَلٌ ثُمَّ ذَكَرَ مَعْنَاهُ
There was no other mu'adhdhin (pronouncer) of the Messenger of Allah ﷺ except Bilal. The narrator then reported the tradition to the same effect.
لَمْ يَكُنْ لِرَسُولِ اللَّهِ ﷺ إِلاَّ مُؤَذِّنٌ وَاحِدٌ بِلاَلٌ ثُمَّ ذَكَرَ مَعْنَاهُ