تفسير : (containing) i.e. the page of muhammad (pbuh) contains (correct scriptures) a religion and a straight and just way that contains no crookedness.
Jalāl al-Dīn al-Maḥallī
تفسير : wherein are upright precepts, written rulings that are upright, that is to say, one who recites what contains all that, and that is the qur’ān. thus some of them believed in it, while others disbelieved.