Islam called people for the oneness and worship of Allah alone without any partner. It secures its followers and entrusts their hearts’ affairs to Allah, the All-Knowing. In this hadith, the Prophet ﷺ confirms that whoever bears witness and says that “there is no god but Allah,” i.e. there is no god worthy of worship but Allah and “disbelieves in what is worshiped besides Allah,” i.e. he renounces all religions except Islam “his property and blood are inviolable.” His property is neither taken nor his blood is shed. In the two Sahihs, Abu Hurairah narrated that the Prophet ﷺ said, “…except for a right that is due,” This means that killing a Muslim is not allowable unless he commits a crime that necessitates killing him according to Islam’s rules in three cases: (1) The murderer is killed in retribution, (2) The apostate, and (3) The married adulterer is killed as a punishment. In the two Sahihs, Abdullah ibn Masoud said, “The Messenger of Allah ﷺ said, ‘The blood of a Muslim who testifies that there is no god but Allah and that I am Allah’s Messenger may not be Islamically shed but for one of three reasons: A life for a life, a married one who commits adultery, and a one who abandons Islam and Muslims’ community.” The Prophet said in the first hadith, “… and his reckoning is with Allah,” This means that we reckon him for the outward obligatory acts but his heart’s affairs are entrusted to Allah Who is the only one who knows what his heart conceals of faith, disbelief, or hypocrisy. Muslims are not commanded to examine people’s hearts, consciences, and beliefs. If one unfaithfully pronounces the faith’s testimony, he will be dealt with according to his outward acts based on the Islamic rules in this world and his reckoning will be with Allah in the hereafter. He will reward him based on his knowledge of his heart. If he sincerely believes, it will benefit him in the hereafter – as in this worldly life - and save him from the torment. On the contrary, if he does not, it will not benefit him in the hereafter and he will be a hypocrite in Hell. In the two Sahihs, Abdullah ibn Omar narrated that the Messenger of Allah ﷺ said, “I have been commanded to fight people till they testify that there is no god but Allah and that Muhammad is the messenger of Allah, establish prayer, and pay Zakat. If they do so, their blood and property are safe from me, except for a right that is due, and reckoning them is with Allah.” Anas narrated as in Sahih Bukhari that the Prophet ﷺ said, “If anyone observes our form of prayer, faces our prayer destination, and eats our sacrifice, he is the Muslim who has the covenant of Allah and His messenger so do not betray Allah’s covenant.” This clarifies that the testimony of monotheism necessitates fulfilling the remaining pillars of Islam, for whoever denies any of its pillars is an apostate. Finally, this hadith confirms that the testimony of monotheism protects one’s blood, property, and honor..