According to search-discovered classical Islamic scholarship, the concept of the Continuity of the Divine Message, explicitly detailed in Quran 42:13, establishes that the core religion (Deen) ordained by Allah is one and the same for all prophets. Ibn Kathir explains this verse confirms that Noah, Abraham, Moses, Jesus, and Muhammad ﷺ all called humanity to the singular creed of Tawheed—the worship of God alone. This interpretation is supported by Al-Qurtubi, who clarifies that while the fundamental principles of faith (Usul ad-Deen) are unified, specific legal frameworks (Shari'ah) were tailored for different nations and times. The synthesis of classical authorities shows this verse as a foundational principle of Islamic creed (Aqeedah), commanding believers to establish this unified faith and refrain from division. Contemporary scholars affirm this classical framework underscores Islam's universality and its role as the culmination of a single, consistent divine guidance for all humanity.