The freed slave of Sayyiduna Uthman bin Affan, Hazrat Muhammad bin Yusuf (may Allah have mercy on him), narrates that when the muezzin gave the adhan and said: «‏‏‏‏اللهُ أَكْبَرُ، للهُ أَكْبَرُ» ‏‏‏‏ "Allah is the Greatest, Allah is the Greatest," then Sayyiduna Muawiyah bin Abi Sufyan (may Allah be pleased with him) said «‏‏‏‏اللهُ أَكْبَرُ، للهُ أَكْبَرُ» ‏‏‏‏ so he said «‏‏‏‏أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللهُ» ‏‏‏‏ "I bear witness that there is no deity worthy of worship except Allah," Sayyiduna Muawiyah (may Allah be pleased with him) also said «‏‏‏‏أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللهُ» ‏‏‏‏ he said «‏‏‏‏أَشْهَدُ أَنْ مُحَمَّدٌ رَسُولُ ٱللَّٰه» ‏‏‏‏ "I bear witness that Muhammad (peace and blessings be upon him) is the Messenger of Allah." Sayyiduna Muawiyah (may Allah be pleased with him) also said «‏‏‏‏أَشْهَدُ أَنْ مُحَمَّدٌ رَسُولُ ٱللَّٰه» ‏‏‏‏ Then Sayyiduna Muawiyah (may Allah be pleased with him) said that I heard the Messenger of Allah (peace and blessings be upon him) saying in this manner.