Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
tabarani:18539 – ʿAbdullāh b. Aḥmad b. Ḥanbal Wmuḥammad b. ʿAbdullāh al-Ḥaḍramī Wmaḥmūd b. Muḥammad al-Wāsiṭī > Zakariyyā b. Yaḥyá Zaḥmawayh > Ziyād b. ʿAbdullāh > Idrīs al-Awdī > ʿAwn b. Abū Juḥayfah from his father

[Machine] That Bilal used to give the call to prayer for the Messenger of Allah ﷺ with two voices.  

الطبراني:١٨٥٣٩ – حَدَّثَنَا عَبْدُ اللهِ بْنُ أَحْمَدَ بْنِ حَنْبَلٍ ومُحَمَّدُ بْنُ عَبْدِ اللهِ الْحَضْرَمِيُّ ومَحْمُودُ بْنُ مُحَمَّدٍ الْوَاسِطِيُّ قَالُوا ثنا زَكَرِيَّا بْنُ يَحْيَى زَحْمَوَيْهِ قَالَ ثنا زِيَادُ بْنُ عَبْدِ اللهِ عَنْ إِدْرِيسَ الْأَوْدِيِّ عَنْ عَوْنِ بْنِ أَبِي جُحَيْفَةَ عَنْ أَبِيهِ

أَنَّ بِلَالًا كَانَ «يُؤَذِّنُ لِرَسُولِ اللهِ ﷺ بِصَوْتَيْنِ صَوْتَيْنِ»