Surah An-Najm Verse 28

وَمَا لَهُمْ بِهِ مِنْ عِلْمٍ ۖ إِنْ يَتَّبِعُونَ إِلَّا الظَّنَّ ۖ وَإِنَّ الظَّنَّ لَا يُغْنِي مِنَ الْحَقِّ شَيْئًا

And they have thereof no knowledge. They follow not except assumption, and indeed, assumption avails not against the truth at all