Quran 36:15 from Surah Yaseen on Divine Marvels.
قَالُواْ مَآ أَنتُمۡ إِلَّا بَشَرٞ مِّثۡلُنَا وَمَآ أَنزَلَ ٱلرَّحۡمَٰنُ مِن شَيۡءٍ إِنۡ أَنتُمۡ إِلَّا تَكۡذِبُونَ
English translation: They said Not you (are) but human beings like us and not has revealed the Most Gracious any thing Not you (are) but lying
Transliteration: qalu ma antum illa basharun mith'luna wama anzala al-rahmanu min shayin in antum illa takdhibuna