Quran 18:20 from Surah Al-Kahf on Divine Marvels.
إِنَّهُمۡ إِن يَظۡهَرُواْ عَلَيۡكُمۡ يَرۡجُمُوكُمۡ أَوۡ يُعِيدُوكُمۡ فِي مِلَّتِهِمۡ وَلَن تُفۡلِحُوٓاْ إِذًا أَبَدٗا
English translation: Indeed [they] if they come to know about you they will stone you or return you to their religion And never will you succeed then ever
Transliteration: innahum in yazharu alaykum yarjumukum aw yu'idukum fi millatihim walan tuf'lihu idhan abadan