Surah An-Najm, Verse 28
وَمَا لَهُم بِهِۦ مِنْ عِلْمٍ ۖ إِن يَتَّبِعُونَ إِلَّا ٱلظَّنَّ ۖ وَإِنَّ ٱلظَّنَّ لَا يُغْنِى مِنَ ٱلْحَقِّ شَيْـًۭٔا
Translation — Sahih International
And they have thereof no knowledge. They follow not except assumption, and indeed, assumption avails not against the truth at all.
Source
Kur'an-ı Kerim, Necm Suresi 53:28
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/53-suresi-28-ayet