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
ahmad:16898 – Ibn Numayr > Ṭalḥah b. Yaḥyá > ʿĪsá b. Ṭalḥah Qālasamiʿt Muʿāwiyah > Idhā Atāh al-Muʾadhhin Yuʾdhinuh Bi-al-Ṣṣalāh

[Machine] I heard Muawiyah say, "When the Muadhin comes to call him for prayer, I heard the Messenger of Allah ﷺ say, 'Verily, the Muadhins will have the longest necks on the Day of Resurrection.'"  

أحمد:١٦٨٩٨ – حَدَّثَنَا ابْنُ نُمَيْرٍ حَدَّثَنَا طَلْحَةُ بْنُ يَحْيَى عَنْ عِيسَى بْنِ طَلْحَةَ

قَالَسَمِعْتُ مُعَاوِيَةَ يَقُولُ إِذَا أَتَاهُ الْمُؤَذِّنُ يُؤْذِنُهُ بِالصَّلَاةِ سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ إِنَّ الْمُؤَذِّنِينَ أَطْوَلُ النَّاسِ أَعْنَاقًا يَوْمَ الْقِيَامَةِ  

See similar narrations below:

Collected by Aḥmad
ahmad:16861 – Ibn Numayr And Yaʿlá > Ṭalḥah / Ibn Yaḥyá > ʿĪsá b. Ṭalḥah > Muʿāwiyah

"I heard Mu'awiyah bin Abu Sufyan say that Messenger of Allah said: "The Mu'adh-dhin will have the longest necks of all people on the Day of Resurrection." (Using translation from Ibn Mājah 725)   

أحمد:١٦٨٦١ – حَدَّثَنَا ابْنُ نُمَيْرٍ وَيَعْلَى قَالَا حَدَّثَنَا طَلْحَةُ يَعْنِي ابْنَ يَحْيَى عَنْ عِيسَى بْنِ طَلْحَةَ قَالَ سَمِعْتُ مُعَاوِيَةَ يَقُولُ

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ إِنَّ الْمُؤَذِّنِينَ أَطْوَلُ النَّاسِ أَعْنَاقًا يَوْمَ الْقِيَامَةِ