It is narrated from Sayyiduna Sa’d bin Abi Waqqas (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said:“Whoever, upon hearing the words of the muezzin, says: «وَأَنَا أَشْهَدُ أَنْ لَا إِلٰهَ إِلَّا اللّٰهُ وَحْدَهُ لَا شَرِيكَ لَهُ وَأَنَّ مُحَمَّدًا عَبْدُهُ وَرَسُولُهُ رَضِينَا بِاللّٰهِ رَبًّا وَبِمُحَمَّدٍ رَسُولًا وَبِالْإِسْلَامِ دِينًا» ‘I also bear witness that there is no deity except Allah, and that Muhammad (peace and blessings be upon him) is His servant and Messenger. I am pleased and content with Allah as my Lord, with Muhammad (peace and blessings be upon him) as my Messenger, and with Islam as my religion,’ all his sins will be forgiven.”