"Wa-idha qila lahum" (And when it is said to them) - when the believers say to the polytheists: "Madhay anzala rabbukum qalu asatir al-awwalin" (What has your Lord sent down? They say: Legends of the ancients), meaning: the lies and falsehoods of the ancients. It is in the nominative case because it is a citation of...
﴿وَإِذا قيل لَهُم﴾ إِذَا قَالَ الْمُؤْمِنُونَ لِلْمُشْرِكِينَ: ﴿مَاذَا أَنْزَلَ رَبُّكُمْ قَالُوا أَسَاطِيرُ الأَوَّلِينَ﴾ أَيْ: كَذِبُ الأَوَّلِينَ وَبَاطِلِهِمْ؛ وَارْتَفَعَتْ لأَنَّهَا حِكَايَةٌ عَلَى
