أَمْ ءَاتَيْنَـٰهُمْ كِتَـٰبًا مِّن قَبْلِهِۦ فَهُم بِهِۦ مُسْتَمْسِكُونَ
Am aatainaahum Kitaabam min qablihee fahum bihee mustamsikoon
or have We perhaps given them a book before this one, to which they hold fast?
Or have we given them a scripture before this one, to which they hold fast?