Quran 30:58 from Surah Ar-Room on Divine Marvels.
وَلَقَدۡ ضَرَبۡنَا لِلنَّاسِ فِي هَٰذَا ٱلۡقُرۡءَانِ مِن كُلِّ مَثَلٖۚ وَلَئِن جِئۡتَهُم بِـَٔايَةٖ لَّيَقُولَنَّ ٱلَّذِينَ كَفَرُوٓاْ إِنۡ أَنتُمۡ إِلَّا مُبۡطِلُونَ
English translation: And verily We (have) set forth for mankind in this [the] Quran of every example But if you bring them a sign surely will say those who disbelieve Not you (are) except falsifiers
Transliteration: walaqad darabna lilnnasi fi hadha al-qur'ani min kulli mathalin wala-in ji'tahum biayatin layaqulanna alladhina kafaru in antum illa mub'tiluna