18:5

Al-Kahf 18:5

مَّا لَهُم بِهِۦ مِنْ عِلْمٍۢ وَلَا لِءَابَآئِهِمْ ۚ كَبُرَتْ كَلِمَةًۭ تَخْرُجُ مِنْ أَفْوَٰهِهِمْ ۚ إِن يَقُولُونَ إِلَّا كَذِبًۭا

Maa lahum bihee min 'ilminw wa laa li aabaaa'ihim; kaburat kalimatan takhruju min afwaahihim; iny yaqooloona illaa kazibaa

a thing about which they have no knowledge, neither they nor their ancestors. Dreadful is the word that comes out of their mouths. What they utter is merely a lie.