الكهف — Al-Kahf Ayat 20

اِنَّهُمْ اِنْ يَّظْهَرُوْا عَلَيْكُمْ يَرْجُمُوْكُمْ اَوْ يُعِيْدُوْكُمْ فِيْ مِلَّتِهِمْ وَلَنْ تُفْلِحُوْٓا اِذًا اَبَدًا

Innahum iy yaẓharū ‘alaikum yarjumūkum au yu‘īdūkum fī millatihim wa lan tufliḥū iżan abadā(n).

"Indeed, if they come to know of you, they will stone you or return you to their religion. And never would you succeed, then - ever.""