Az-Zukhruf 43:21

Meccan · The Ornaments of Gold

أَمْ ءَاتَيْنَـٰهُمْ كِتَـٰبًا مِّن قَبْلِهِۦ فَهُم بِهِۦ مُسْتَمْسِكُونَ

Or have We given them a book before the Qur'an to which they are adhering