Quran 46:5 from Surah Al-Ahqaf on Divine Marvels.
وَمَنۡ أَضَلُّ مِمَّن يَدۡعُواْ مِن دُونِ ٱللَّهِ مَن لَّا يَسۡتَجِيبُ لَهُۥٓ إِلَىٰ يَوۡمِ ٱلۡقِيَٰمَةِ وَهُمۡ عَن دُعَآئِهِمۡ غَٰفِلُونَ
English translation: And who (is) more astray than (he) who calls besides besides Allah who will not respond will not respond to him until (the) Day (of) Resurrection and they of their calls (are) unaware
Transliteration: waman adallu mimman yad'u min duni al-lahi man la yastajibu lahu ila yawmi al-qiyamati wahum an du'aihim ghafiluna