He also says:

“This is My straight path, so follow it. Do not follow other paths, lest they lead you away from His path.” [al-An‘ām: 153]

He also says:

“There has come to you from Allah a light and a clear Book. * Through it Allah guides those who seek His pleasure to the ways of peace, brings them out of darkness into light by His permission, and guides them to a straight path.” [al-Mā’idah: 15–16]

He also says:

“Alif Lām Rā. This is a Book We have sent down to you so that you may bring people out of darkness into light, by their Lord’s permission, to the path of the Almighty, the Praiseworthy.” [Ibrāhīm: 1]

He also says:

“Is it not enough for them that We have sent down to you the Book, which is recited to them? Surely in this is a mercy and a reminder for people who believe.” [al-‘Ankabūt: 51]

He also says:

“So those who believe in him, honour him, support him, and follow the light sent down with him—it is they who will prosper.” [al-A‘rāf: 157]

There are many passages like these in the Quran in which Allah makes clear that His Book explains the whole religion, clarifies the path of guidance, and suffices those who follow it, leaving them in no need of anything else. It must be followed rather than any other path.

Indeed, “the Prophet (may Allah bless him and grant him peace) used to say in his sermon: ‘The truest speech is the speech of Allah, the best guidance is the guidance of Muhammad, the worst matters are those newly introduced into religion, and every innovation is misguidance.’”

He also used to say: “Adhere to my Sunnah and the Sunnah of the rightly guided caliphs after