‘Abd-Allāh ibn ‘Umar [may Allāh be pleased with them both] said:

“Every innovation [pertaining to the religion] is misguidance [and reprehensible] even if the people consider it good.”

Al-Ibānah al-Kubra | Page 205 | Al-Imām ibn Battah [may Allāh have mercy on him]

Al-Madkhal | Page 191 | Al-Imām al-Bayhaqi [may Allāh have mercy on him]

Translation: Authentic Quotes