Sayyiduna Abu Mahdhurah (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "The mu'adhdhins are the trustees of the Muslims over their breaking of the fast (iftar) and their pre-dawn meal (suhur)."
Imam al-Tabarani recorded it in al-Mu'jam al-Kabir, and its chain is hasan (good).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 1905