(3) باب السُّنَّةِ فِي الأَذَانِ
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) (RU)
Reference (RU): Sunan Ibn Majah 714 (RU)
In-book reference (RU): Book 3, Hadith 9 (RU)
English translation (RU): Vol. 1, Book 3, Hadith 714 (RU)