Surah Al-Baqarah, ayah 78

وَمِنۡهُمۡ أُمِّيُّونَ لَا يَعۡلَمُونَ ٱلۡكِتَٰبَ إِلَّآ أَمَانِيَّ وَإِنۡ هُمۡ إِلَّا يَظُنُّونَ ٧٨

Waminhum ummiyyūna lā ya'lamūnal-kitāba illā amāniyya wa in hum illā yazunnūn

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