رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 1040
The Book of Virtues
The Excellence of Adhan
وَعَنْ سَعْدِ بْنِ أَبِي وَقَّاصٍ رَضِيَ اللَّهُ عَنْهُ عَنِ النَّبِيِّ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ أَنَّهُ قَالَ: مَنْ قَالَ حِينَ يَسْمَعُ الْمُؤَذِّنَ: أَشْهَدُ أَنْ لاَ إِلَهَ إِلاَّ اللَّهُ وَحْدَهُ لاَ شَرِيكَ لَهُ، وَأَنَّ مُحَمَّدًا عَبْدُهُ وَرَسُولُهُ، رَضِيتُ بِاللَّهِ رَبًّا وَبِالْإِسْلَامِ دِينًا، غُفِرَ لَهُ ذَنبه ((رَوَاهُ التِّرْمِذِيّ وَقَالَ حَدِيث حَسَن)).
Sa'd bin Abu Waqqas (May Allah be pleased with him) reported: The Prophet (ﷺ) said, "He who says after the Adhan: 'Ash-hadu an la ilaha illallah Wah-dahu la sharika Lahu; wa ash-hadu anna Muhammadan 'abduhu wa Rasuluhu, radhitu Billahi Rabban, wa bi Muhammadin Rasulan, wa bil Islami Dinan [I testify that there is no true god except Allah Alone; He has no partners and that Muhammad (ﷺ) is His slave and Messenger; I am content with Allah as my Rubb, with Muhammad as my Messenger and with Islam as my Deen],' his sins will be forgiven." [Muslim].
Riyad as-Salihin, 1040