Surah Al-Anfaal, Verse 31
وَإِذَا تُتْلَىٰ عَلَيْهِمْ ءَايَٰتُنَا قَالُوا۟ قَدْ سَمِعْنَا لَوْ نَشَآءُ لَقُلْنَا مِثْلَ هَٰذَآ ۙ إِنْ هَٰذَآ إِلَّآ أَسَٰطِيرُ ٱلْأَوَّلِينَ
Translation — Sahih International
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."
Source
Kur'an-ı Kerim, Enfâl Suresi 8:31
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/8-suresi-31-ayet