Wherein are upright Books.Ibn Jarir said,"Meaning in the purified pages are Books from Allah that are upright, just and straight. They have no mistakes in them because they are from Allah, the Mighty and Majestic."The Differing only occurred after the Knowledge came Allah says,وَمَا تَفَرَّقَ الَّذِينَ أُوتُوا الْكِتَابَ إِلاَّ مِن بَعْدِ مَا جَاءتْهُمُ الْبَيِّنَةُ