The azan is to inform people about prayer time. Its words combine the Islamic doctrine of monotheism. In this hadith, Abu Mahthura narrated the words of the call to prayer as the Prophet (ﷺ) taught him when being appointed as a governor of Mecca in the eighth year after the Battle of Hunein. Although being concise, “Allah is the greatest" refers to His perfection and negates any meaning that may contradict so. It may mean that Allah is too great that we can realize His greatness. The testimony of faith has two parts. The first one is to prove monotheism, mean that no god worthy of worship except Allah, and negate its opposite of having any partnership. It is the testimony that has precedence and priority over any other issue in Islam. The other part is to declare and prove the message of Prophet Muhammad (ﷺ), which directly comes after the testimony of Allah’s oneness. Afterward, the caller urges Muslims twice to come to perform prayer, which mentioned after proving the Prophet's message, for we know the obligation of prayer from the Prophet’s teachings, not due to human realization. Then, the caller commands Muslims twice to come to success, victory, and permanent bliss, which reminds them of the events of the hereafter like resurrection and reckoning. In Abu Daoud's narration, the Prophet (ﷺ) said, "If it is Dawn (Fajr) prayer, you should say, 'Prayer is better than sleeping, prayer is better than sleeping.'" At the end, he concluded the call with, "Allah is the Greatest" twice then said, "There is no god but Allah." In narrations in Sunan Abu Daoud and An-Nasa'i, he mentioned "Allah is the Greatest" four times in the beginning. The words of the call to prayer are repeated more than once to make sure that lots of people know about the prayer time. Finally, this hadith contains the following benefits: (1) It clarifies some of prayer call's formula, and (2) The virtue of the companion Abu Mahthura, for the Prophet (ﷺ) taught him the call words himself..