Quran 26:92 from Surah Ash-Shu'araa on Divine Marvels.
وَقِيلَ لَهُمۡ أَيۡنَ مَا كُنتُمۡ تَعۡبُدُونَ
English translation: And it will be said to them Where (is) that you used (to) worship
Transliteration: waqila lahum ayna ma kuntum ta'buduna