Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "If I were to swear an oath, I would be true (the oath being about this): that the most beloved of Allah's servants to Allah Almighty are those who watch over the sun and the moon." (The narrator says:) The Prophet (peace and blessings be upon him) meant those who call the adhan. (The Prophet (peace and blessings be upon him) said:) "They will be recognised on the Day of Resurrection by their long necks."
Al-Tabarani recorded it in al-Awsat; its chain contains a narrator, Junadah bin Marwan. Al-Dhahabi said: Abu Hatim accused him (of fabrication).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 1838