Hadith 2

Muwatta Malik

Book 3: Prayer
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ عَطَاءِ بْنِ يَزِيدَ اللَّيْثِيِّ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏ ‏ ‏.‏
"‏ إِذَا سَمِعْتُمُ النِّدَاءَ فَقُولُوا مِثْلَ مَا يَقُولُ الْمُؤَذِّنُ ‏"
Yahya related to me from Malik from Ibn Shihab from Ata ibn Yazid al-Laythi from Abu Said al-Khudri that the Messenger of Allah, may Allah bless him and grant him peace, said, "When you hear the adhan, repeat what the muadhdhin says."