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
bukhari:612 – Muʿādh b. Faḍālah > Hishām > Yaḥyá > Muḥammad b. Ibrāhīm b. al-Ḥārith > ʿĪsá b. Ṭalḥah > Muʿāwiyah Yawm > Qawlih And ʾAshhad

that he had heard Muawiya repeating the words of Adhan up to "Wa ash-hadu anna Muhammadan rasulul-lah (and I testify that Muhammad is Messenger of Allah ﷺ.)"  

البخاري:٦١٢ – حَدَّثَنَا مُعَاذُ بْنُ فَضَالَةَ قَالَ حَدَّثَنَا هِشَامٌ عَنْ يَحْيَى عَنْ مُحَمَّدِ بْنِ إِبْرَاهِيمَ بْنِ الْحَارِثِ قَالَ حَدَّثَنِي عِيسَى بْنُ طَلْحَةَ أَنَّهُ سَمِعَ مُعَاوِيَةَ يَوْمًا فَقَالَ

مِثْلَهُ إِلَى قَوْلِهِ وَأَشْهَدُ أَنَّ مُحَمَّدًا رَسُولُ اللَّهِ