Al-Bayyina • EN-TAFSIR-IBN-ABBAS
﴿ فِيهَا كُتُبٌۭ قَيِّمَةٌۭ ﴾
“wherein there are ordinances of ever-true soundness and clarity.”
(Containing) i.e. the page of Muhammad (pbuh) contains (correct scriptures) a religion and a straight and just way that contains no crookedness.