أَخْبَرَنَا مُسْلِمُ بْنُ إِبْرَاهِيمَ، حَدَّثَنَا وُهَيْبٌ، حَدَّثَنَا أَيُّوبُ، عَنْ أَبِي قِلَابَةَ، قَالَ: "مَا ابْتَدَعَ رَجُلٌ بِدْعَةً إِلَّا اسْتَحَلَّ السَّيْفَ".
Abu Qilabah said: Whoever invents a bid'ah (innovation), he has made the sword (killing) lawful. (That is, he is deserving of execution.)