Qur'an 2:78

وَمِنْهُمْ أُمِّيُّونَ لَا يَعْلَمُونَ ٱلْكِتَـٰبَ إِلَّآ أَمَانِىَّ وَإِنْ هُمْ إِلَّا يَظُنُّونَ

“And among them are unlettered ones who do not know the Scripture except [indulgement in] wishful thinking, but they are only assuming.”

Al-Baqara 2:78 · Saheeh International