It is authentically recorded in Ṣaḥīḥ Muslim that the Prophet—may Allah bless him and grant him peace—used to say in his sermons: “The finest speech is Allah’s speech; the best guidance is the guidance of Muhammad; and the worst of matters are those newly introduced—every innovation is misguidance.”

Likewise, the Sunan collections relate—on the authority of ʿIrbāḍ ibn Sāriyah—that the Prophet—may Allah bless him and grant him peace—