Sahih al-Bukhari, Hadith 7548 ⓘ
Narrated `Abdullah bin `Abdur-Rahman: that Abu Sa`id Al-Khudri said to him, "I see that you like sheep and the desert, so when you are looking after your sheep or when you are in the desert and want to pronounce the Adhan, raise your voice, for no Jinn, human being or any other things hear the Mu`adh-dhin's voice but will be a witness for him on the Day of Resurrection." Abu Sa`id added, "I heard this from Allah's Messenger."
حَدَّثَنَا إِسْمَاعِيلُ، حَدَّثَنِي مَالِكٌ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ عَبْدِ اللَّهِ بْنِ عَبْدِ الرَّحْمَنِ بْنِ أَبِي صَعْصَعَةَ، عَنْ أَبِيهِ، أَنَّهُ أَخْبَرَهُ أَنَّ أَبَا سَعِيدٍ الْخُدْرِيَّ ـ رضى الله عنه ـ قَالَ لَهُ " إِنِّي أَرَاكَ تُحِبُّ الْغَنَمَ وَالْبَادِيَةَ، فَإِذَا كُنْتَ فِي غَنَمِكَ أَوْ بَادِيَتِكَ فَأَذَّنْتَ لِلصَّلاَةِ فَارْفَعْ صَوْتَكَ بِالنِّدَاءِ، فَإِنَّهُ لاَ يَسْمَعُ مَدَى صَوْتِ الْمُؤَذِّنِ جِنٌّ وَلاَ إِنْسٌ وَلاَ شَىْءٌ، إِلاَّ شَهِدَ لَهُ يَوْمَ الْقِيَامَةِ " . قَالَ أَبُو سَعِيدٍ سَمِعْتُهُ مِنْ رَسُولِ اللَّهِ صلى الله عليه وسلم.
also referenced under: Book 97, Hadith 173 (In-Book) & Volume 9, Book 93, Hadith 638 (USC-MSA)