Surah Al-Kahf 18:5
مَّا لَهُم بِهِۦ مِنْ عِلْمٍ وَلَا لِءَابَآئِهِمْ ۚ كَبُرَتْ كَلِمَةً تَخْرُجُ مِنْ أَفْوَٰهِهِمْ ۚ إِن يَقُولُونَ إِلَّا كَذِبًا ٥
EnglishSahih International
They have no knowledge of it, nor had their fathers. Grave is the word that comes out of their mouths; they speak not except a lie.