(4) باب مَا يُقَالُ إِذَا أَذَّنَ الْمُؤَذِّنُ
It was narrated that Abu Hurairah said:
"The Messenger of Allah said: 'When the Mu'adh-dhin calls the Adhan, say as he says.'" (ID)
Reference (ID): Sunan Ibn Majah 718 (ID)
In-book reference (ID): Book 3, Hadith 13 (ID)
English translation (ID): Vol. 1, Book 3, Hadith 718 (ID)