The Obligation of Implementing the Sunnah and Deeming Whoever Rejects It of Disbelief & The Obligation of Adhering to the Sunnah and Being Wary of Innovation

From the book:Allāh () says in Sūrah An-Nūr, “And let those who oppose the Messenger's (Muḥammad (May Allāh elevate his rank & grant him peace)) commandment (i.e., his Sunnah – legal ways, orders, acts of worship, statements) (among the sects) beware, let some Fitnah (disbelief, trials, afflictions, earthquakes, killing, overpowered by a tyrant) should befall them or a painful torment be inflicted on them.” [Sūrah an-Nūr 24:63] and Allāh says in Sūrah Al-Hashr, “And whatsoever the Messenger (Muḥammad (May Allāh elevate his rank & grant him peace)) gives you, take it; and whatsoever he forbids you, abstain (from it).” [Sūrah al-Hashr 59:7] In this regard, many verses indicate the obligation of obeying the Prophet and adhering to his Sunnah. Also, previous evidence indicated the obligation of adhering to the Book of Allāh, sticking to it, and complying with his orders and abstaining from its prohibitions. These are two relevant fundamentals in which whoever denies one of them denies the other. This is considered an act of disbelief and misguidance which takes one outside the fold of Islām as agreed by all the scholars. The ahādīth of the Prophet (May Allāh elevate his rank & grant him peace) indicated the obligation of obeying the Messenger of Allāh (May Allāh elevate his rank & grant him peace), following his Sunnah and refraining from disobeying him. All of this is relative to the people of his era as well as those to come. It is related by Al-Bukhārī, and Muslim on the authority of Abū Hurayrah (May Allāh be pleased with him) the Prophet (May Allāh elevate his rank & grant him peace) said: “whosoever obeys me, obeys Allāh; and he who disobeys me disobeys Allāh.”