Quran 26:70 from Surah Ash-Shu'araa on Divine Marvels.
إِذۡ قَالَ لِأَبِيهِ وَقَوۡمِهِۦ مَا تَعۡبُدُونَ
English translation: When he said to his father and his people What (do) you worship
Transliteration: idh qala li-abihi waqawmihi ma ta'buduna