Mu'awiyah (May Allah be pleased with him) reported:
I heard the Messenger of Allah (ﷺ) saying: "The Mu'adhdhinun (callers to prayer) will have the longest necks on the Day of Resurrection."[Muslim]. (ID)
App reference (ID): Book 9, Hadith 44 (ID)
Arabic/English book reference (ID): Book 9, Hadith 1034 (ID)