Quran 6:81 from Surah Al-An'aam on Divine Marvels.
وَكَيۡفَ أَخَافُ مَآ أَشۡرَكۡتُمۡ وَلَا تَخَافُونَ أَنَّكُمۡ أَشۡرَكۡتُم بِٱللَّهِ مَا لَمۡ يُنَزِّلۡ بِهِۦ عَلَيۡكُمۡ سُلۡطَٰنٗاۚ فَأَيُّ ٱلۡفَرِيقَيۡنِ أَحَقُّ بِٱلۡأَمۡنِۖ إِن كُنتُمۡ تَعۡلَمُونَ
English translation: And how could I fear what you associate (with Allah) while not you fear that you have associated with Allah what not did He send down for it to you any authority So which (of) the two parties has more right to security if you know
Transliteration: wakayfa akhafu ma ashraktum wala takhafuna annakum ashraktum bil-lahi ma lam yunazzil bihi alaykum sul'tanan fa-ayyu al-fariqayni ahaqqu bil-amni in kuntum ta'lamuna