Surah Az-Zukhruf, ayah 21

43:21

أَمۡ ءَاتَيۡنَٰهُمۡ كِتَٰبٗا مِّن قَبۡلِهِۦ فَهُم بِهِۦ مُسۡتَمۡسِكُونَ ٢١

Am ātaynāhum kitābam min qablihī fahum bihī mustamsikūn

Or have We given them a book before it [i.e., the Qur’ān] to which they are adhering?