Quran 42:21 from Surah Ash-Shura on Divine Marvels.
أَمۡ لَهُمۡ شُرَكَٰٓؤُاْ شَرَعُواْ لَهُم مِّنَ ٱلدِّينِ مَا لَمۡ يَأۡذَنۢ بِهِ ٱللَّهُۚ وَلَوۡلَا كَلِمَةُ ٱلۡفَصۡلِ لَقُضِيَ بَيۡنَهُمۡۗ وَإِنَّ ٱلظَّٰلِمِينَ لَهُمۡ عَذَابٌ أَلِيمٞ
English translation: Or for them (are) partners who have ordained for them of the religion what not has given permission of it Allah And if not (for) a word decisive surely, it (would have) been judged between them And indeed the wrongdoers for them (is a) punishment painful
Transliteration: am lahum shurakau shara'u lahum mina al-dini ma lam yadhan bihi al-lahu walawla kalimatu al-fasli laqudiya baynahum wa-inna al-zalimina lahum adhabun alimun