Yahya narrated it on the authority of his uncle t that he had been sitting in the company of Mu’awiya b. Abu Sufyan when the Mu’adhdhin called (Muslims) to prayer. Mu’awiya said:
I heard the Messenger of Allah (ﷺ) saying The Mu’adhdhins will have the longest necks on the Day of Resurrection.
Reference : Sahih Muslim 387