Hold fast to the rope of the Qur’an and take counsel from it, consider as permissible what it permits and forbidden what it forbids, and act on its injunctions and rulings
There will come a time upon the people when nothing of the Qur’an will remain except its written text, and nothing of Islam [will remain] but its name; on that day their masjids will be marvellously constructed buildings, but will be empty of (or desolate with regards to) guidance