حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا حَفْصُ بْنُ غِيَاثٍ، عَنْ أَشْعَثَ، عَنِ الْحَسَنِ، عَنْ عُثْمَانَ بْنِ أَبِي الْعَاصِ، قَالَ كَانَ آخِرُ مَا عَهِدَ إِلَىَّ النَّبِيُّ ـ صلى الله عليه وسلم ـ أَنْ لاَ أَتَّخِذَ مُؤَذِّنًا يَأْخُذُ عَلَى الأَذَانِ أَجْرًا ‏.‏

It was narrated that 'Uthman bin Abul-As said: "The last instruction that the Messenger of Allah gave to me was that I should not appoint a Mu'adh-dhin who took payment for the Adhan." (sahih) Translation Not Available

Book Ref: Sunan Ibn Majah Book 3 Hadith 714
Web Ref:  Sunan Ibn Majah Vol 1 Book 3 Hadith 714

---