وَإِذَا تُتْلَىٰ عَلَيْهِمْ ءَايَٰتُنَا قَالُوا۟ قَدْ سَمِعْنَا لَوْ نَشَآءُ لَقُلْنَا مِثْلَ هَٰذَآ ۙ إِنْ هَٰذَآ إِلَّآ أَسَٰطِيرُ ٱلْأَوَّلِينَ
And when Our verses are recited to them, they say, "We have heard. If we willed, we could say [something] like this. This is not but legends of the former peoples."
And when Our verses namely the Qur’ān were being recited to them they said ‘We have already heard! If we wish we can speak the like of this — al-Nadr b. al-Hārith said this for he used to travel on trading business to al-Hīra where he would buy books containing the tales of the Persians and would recount these to the Meccans; this Qur’ān is nothing but the fables the lies of the ancients’.