أَمْ ءَاتَيْنَٰهُمْ كِتَٰبًا مِّن قَبْلِهِۦ فَهُم بِهِۦ مُسْتَمْسِكُونَ
Or have We given them a book before it, so they are holding fast to it?
Roots in this verse: ا ت ي (Aty), ك ت ب (ktb), ق ب ل (qbl), م س ك (msk)