Quran 67:9 from Surah Al-Mulk on Divine Marvels.
قَالُواْ بَلَىٰ قَدۡ جَآءَنَا نَذِيرٞ فَكَذَّبۡنَا وَقُلۡنَا مَا نَزَّلَ ٱللَّهُ مِن شَيۡءٍ إِنۡ أَنتُمۡ إِلَّا فِي ضَلَٰلٖ كَبِيرٖ
English translation: They will say Yes indeed came to us a warner but we denied and we said Not has sent down Allah any thing Not you (are) but in error great
Transliteration: qalu bala qad jaana nadhirun fakadhabna waqul'na ma nazzala al-lahu min shayin in antum illa fi dalalin kabirin