(Al-Kahf) 18 : 5
مَا لَهُمْ بِهِ مِنْ عِلْمٍ وَلَا لِآبَائِهِمْ ۚ كَبُرَتْ كَلِمَةً تَخْرُجُ مِنْ أَفْوَاهِهِمْ ۚ إِنْ يَقُولُونَ إِلَّا كَذِبًا
They have no Knowledge of it, nor had their fathers; grievous are the words coming from their mouths, indeed they are saying nothing except a lie.
This verse is revealed as a reply to the people of the Book (Jews and Christian) and Meccan pagans for their claim upon Lord that He has chosen a son. Today the Arabic Quran reading Fujjar are the people of the last Book. But by hiding and rejecting Adhikr, they are having an evil concept about Lord, and they will have evil consequences; Lord’s wrath and curse have happened upon them, and Hell is kept prepared for them as their returning place as explained in verse 9: 28. See explanation 6: 100; 9: 30-31; 16: 2 and 36.