Section: Dua while hearing the adhaan

Narrated by 'Umar ibn al-Khattab (RA), he said, The Messenger of Allah (ﷺ) said: When the muazzin says "Allahu Akbar Allahu Akbar", Then if any of you say “Allahu Akbar Allahu Akbar; When the muazzin says "Ashhadu an laa ilaaha illallah", If he says "Ashhadu an laa ilaaha illallah"; When Muazzin says “Ashhadu Anna Muhammadar Rasoolullah, If he says "Ashhadu Anna Muhammadar Rasoolullah"; When the muazzin says "Haiya alas salah", If he says "Laa hawla wala quwwata illa billah"; When the muazzin says "Haiya alal falah", If he says "Laa hawla wala quwwata illa billah"; When the muazzin says "Allahu Akbar Allahu Akbar", If he says "Allahu Akbar Allahu Akbar", Then when the muazzin says "Laa ilaaha illallah", If he says "Laa ilaaha illallah" If he says these things from the heart, then he will go to Paradise.

After uttering Mu'adhdhin Tashahhud (i.e. Ashhadu Anna Muhammadar ...) the listeners will say this dhikr -

أَشْهَدُ أَنْ لَا إِلَهَ إِلاَّ اللَّهُ وَحْدَهُ لَا شَرِيكَ لَهُ وَأَنَّ مُحَمَّدًا عَبْدُهُ وَرَسُولُهُ رَضِيتُ بِاللَّهِ رَبًّا وَبِمُحَمَّدٍ رَسُولًا وَبِالْإِسْلَامِ دِينًا

اَشْهَدُ اَنْ لَّا اِلٰهَ اِلَّا اللّٰهُ وَحْدَهٗ لَا شَرِيْكَ لَهٗ وَاَنَّ مُحَمَّدًا عَبْدُهٗ وَرَسُوْلُهٗ ، رَضِيْتُ بِاللّٰهِ رَبًّا وَّبِمُحَمَّدٍ رَّسُوْلًا وَّبِالْاِسْلَامِ دِيْنًا

Ash-hadu an laa ilaaha ill-Allahu wa'hdahu laa shareeka lahu wa anna mu'hammadan ‛abduhu wa rasooluhu, radeetu billaahi rabban wa bimu'hammadin rasoolan wa bil -islaami deen-an

Sa'd ibn Abi Waqqas (RA) said: The Messenger of Allah (ﷺ) said: "Whoever hears Mu'adhzin and utters these words, all his sins will be forgiven."