Abdur Rahman bin Abi Laila narrates that when Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) heard the muezzin giving the adhan, he would repeat exactly what the muezzin said, and when the muezzin said "Ashhadu an la ilaha illallah" and "Ashhadu anna Muhammadan Rasulullah," Sayyiduna Ali (may Allah be pleased with him) would also say "Ashhadu an la ilaha illallah" and "Ashhadu anna Muhammadan Rasulullah," but along with this he would also say: ((WA INNA ALLADHINA JAHADU MUHAMMADAN HUM AL-KADHIBUN)) "Indeed, those who denied Muhammad (peace and blessings be upon him) are the liars."

Sayyiduna Sa’d bin Abi Waqqas (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: Whoever, upon hearing the muezzin, recites this supplication: ((And I also bear witness that there is no deity except Allah, He is alone, He has no partner, and that Muhammad is His servant and Messenger. We are pleased with Allah as Lord, with Muhammad as Messenger, and with Islam as religion.)) … then his sins are forgiven.

It is narrated from Sayyiduna Abdullah bin Amr bin Aas (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: When you hear the muezzin, then say as he says, then send blessings upon me, because whoever sends blessings upon me once, Allah Almighty sends ten mercies upon him. After that, ask Allah to grant me al-Wasilah, for it is a rank in Paradise which is fitting for only one of Allah’s servants, and I hope that I am that servant. Whoever asks al-Wasilah for me, my intercession will become lawful for him.

It is narrated from Sayyiduna Abu Sa'id Khudri, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: Wasila is a rank in Paradise, and there is no higher rank than it in excellence. You should supplicate to Allah Almighty that He grants me this Wasila.

Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with him) narrates that a man said to the Messenger of Allah (peace and blessings be upon him): O Messenger of Allah! Will the mu’adhdhins surpass us in virtue because of their calls to prayer? The Messenger of Allah (peace and blessings be upon him) said to him: Whatever (words) they say while giving the adhan, you also repeat them, then when you finish, ask (Allah), (whatever you ask for) will be given to you.

Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates: We were with the Noble Prophet (peace and blessings be upon him) on the high hills of Yemen. Sayyiduna Bilal (may Allah be pleased with him) stood up and began to call the Adhan. When he finished the Adhan, the Messenger of Allah (peace and blessings be upon him) said: Whoever says (these words) with certainty in the same way as he (Bilal) has said, he will enter Paradise.

Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: When you hear the call to prayer (adhan), then repeat what the caller (mu'adhdhin) says.

It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Whoever, after hearing the call to prayer, recites this supplication: ((O Allah! Lord of this perfect call and the established prayer, grant Muhammad the means and virtue, and raise him to the praiseworthy station which You have promised him)), then my intercession will be made obligatory for him on the Day of Resurrection.

It is also narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Whoever, after hearing the call of the muezzin, recites this supplication: ((اللَّہُمَّ رَبَّ ھٰذِہِ الدَّعْوَۃِ التَّامَّۃِ وَالصَّلَاۃِ النَّافِعَۃِ صَلِّ عَلٰی مُحَمَّدِ وَارْضَ عَنِّی رِضاً لَا تَسْخَطُ بَعْدَہُ اِسْتَجَابَ اللّٰہُ لَہُ دَعْوَتَہُ۔)) O Allah! Lord of this complete call and beneficial prayer! Send blessings upon Muhammad (peace and blessings be upon him), and be pleased with me with such pleasure after which You will never be displeased. … then Allah Almighty accepts his supplication.

Abdullah bin Alqamah bin Waqas says: I was with Sayyiduna Muawiyah (may Allah be pleased with him), when his muezzin gave the call to prayer, he (Muawiyah) repeated the same (words) as the muezzin said, until when he (the muezzin) said "Hayya 'ala al-falah," Sayyiduna Muawiyah (may Allah be pleased with him) said "La hawla wa la quwwata illa billah," and after that he repeated what the muezzin said. Then he explained that he had heard the Messenger of Allah (peace and blessings be upon him) saying the same.