Al-Anfal - 8:31

وَإِذَا تُتْلَى عَلَيْهِمْ آيَاتُنَا قَالُواْ قَدْ سَمِعْنَا لَوْ نَشَاء لَقُلْنَا مِثْلَ هَـذَا إِنْ هَـذَا إِلاَّ أَسَاطِيرُ الأوَّلِينَ
[8:31]
And when Our communications are recited to them, they say: We have heard indeed; if we pleased we could say the like of it; this is nothing but the stories of the ancients.
When Our Signs are rehearsed to them, they say: "We have heard this (before): if we wished, we could say (words) like these: these are nothing but tales of the ancients."
And when Our revelations are recited unto them they say: We have heard. If we wish we can speak the like of this. Lo! this is naught but fables of the men of old.