Quran 77:29 from Surah Al-Mursalaat on Divine Marvels.
ٱنطَلِقُوٓاْ إِلَىٰ مَا كُنتُم بِهِۦ تُكَذِّبُونَ
English translation: Proceed to what you used in it (to) deny
Transliteration: intaliqu ila ma kuntum bihi tukadhibuna