blind adherence to tradition

قَالُوٓا۟ أَجِئْتَنَا لِتَلْفِتَنَا عَمَّا وَجَدْنَا عَلَيْهِ ءَابَآءَنَا وَتَكُونَ لَكُمَا ٱلْكِبْرِيَآءُ فِى ٱلْأَرْضِ وَمَا نَحْنُ لَكُمَا بِمُؤْمِنِينَ

They said, "Have you come to us to turn us away from that upon which we found our fathers and so that you two may have grandeur in the land? And we are not believers in you."

فَلَمَّا جَآءَهُم مُّوسَىٰ بِـَٔايَـٰتِنَا بَيِّنَـٰتٍ قَالُوا۟ مَا هَـٰذَآ إِلَّا سِحْرٌ مُّفْتَرًى وَمَا سَمِعْنَا بِهَـٰذَا فِىٓ ءَابَآئِنَا ٱلْأَوَّلِينَ

But when Moses came to them with Our signs as clear evidences, they said, "This is not except invented magic, and we have not heard of this [religion] among our forefathers."