سورة Az-Zukhruf 43:21

أَمْ ءَاتَيْنَـٰهُمْ كِتَـٰبًۭا مِّن قَبْلِهِۦ فَهُم بِهِۦ مُسْتَمْسِكُونَ ٢١

Or have We given them a Book ˹for proof˺, before this ˹Quran˺, to which they are holding firm