Al-Kahf (The Cave)

Surah 18 · Verse 5

Neither they have any knowledge of it nor their fathers (had). (It is a) grievous word that comes out of their mouths, they speak nothing but a lie.

مَا لَهُمْ بِهِ مِنْ عِلْمٍ وَلَا لِآبَائِهِمْ ۚ كَبُرَتْ كَلِمَةً تَخْرُجُ مِنْ أَفْوَاهِهِمْ ۚ إِنْ يَقُولُونَ إِلَّا كَذِبًا