مَنْ أَحْدَثَ فِي أَمْرِنَا هَذَا مَا لَيْسَ مِنْهُ، فَهُوَ رَدٌّ
Translation: Whoever introduces into this religious matter of ours something that does not belong to it, it is rejected.
Source: البخاري ومسلم
أَحْدَثَ here means introducing something as part of religion without valid religious basis. فِي أَمْرِنَا هَذَا refers to “this religious matter of ours”; مَا لَيْسَ مِنْهُ means what does not belong to it. فَهُوَ رَدٌّ indicates rejection or nonacceptance.
Acts of worship and religious prescriptions should remain grounded in the guidance of Allah and His Messenger ﷺ. The statement does not categorize every new administrative method or device as a forbidden religious act.