﴿ وَإِن تُطِعْ أَكْثَرَ مَن فِى ٱلْأَرْضِ يُضِلُّوكَ عَن سَبِيلِ ٱللَّهِ ۚ إِن يَتَّبِعُونَ إِلَّا ٱلظَّنَّ وَإِنْ هُمْ إِلَّا يَخْرُصُونَ ﴾

“Now if thou pay heed unto the majority of those [who live] on earth, they will but lead thee astray from the path of God: they follow but [other people's] conjectures, and they themselves do nothing but guess.”

Please check ayah 6:117 for complete tafsir.