884. hadíth
وَ رُوِيَ: «أَنَّ اَلْمَلاَئِكَةَ إِذَا سَمِعَتِ اَلْأَذَانَ مِنْ أَهْلِ اَلْأَرْضِ قَالَتْ هَذِهِ أَصْوَاتُ أُمَّةِ مُحَمَّدٍ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ بِتَوْحِيدِ اَللَّهِ فَيَسْتَغْفِرُونَ اَللَّهَ لِأُمَّةِ مُحَمَّدٍ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ حَتَّى يَفْرُغُوا مِنْ تِلْكَ اَلصَّلاَةِ.
It is narrated: "When the angels hear the adhan (call to prayer) from the people of the earth, they say, 'These are the voices of the nation of Muhammad (saws) declaring the oneness of Allah (swt).' They then seek forgiveness from Allah (swt) for the nation of Muhammad until the prayer is completed."