The (Adhan Supplication) is a powerful prayer recited by Muslims immediately following the call to prayer (Adhan). According to Sahih al-Bukhari, the Prophet Muhammad (peace be upon him) promised his intercession on the Day of Judgment for whoever recites this dua after hearing the Adhan. Arabic Text
اللَّهُمَّ رَبَّ هَذِهِ الدَّعْوَةِ التَّامَّةِ، وَالصَّلَاةِ الْقَائِمَةِ، آتِ مُحَمَّدًا الْوَسِيلَةَ وَالْفَضِيلَةَ، وَابْعَثْهُ مَقَامًا مَحْمُودًا الَّذِي وَعَدْتَهُ، [إِنَّكَ لَا تُخْلِفُ الْمِيعَادَ] Transliteration Ezan Duasi
Beyond the final dua, there are specific sunnah (recommended) actions to perform while the Adhan is being called: The (Adhan Supplication) is a powerful prayer recited
Allahumma Rabba hadhihid-da‘watit-tammah, was-salatil-qa’imah, ati Muhammadanil-wasilata wal-fadhilah, wab‘athhu maqamam-mahmudanil-ladhi wa‘adtah, [innaka la tukhliful-mi‘ad] . Translation Translation : When the Mu'azzin says "Hayya 'alas-salah"
: When the Mu'azzin says "Hayya 'alas-salah" (Come to prayer) or "Hayya 'alal-falah" (Come to success), respond with: "La hawla wa la quwwata illa billah" (There is no might or power except with Allah).