Surah Ali'Imran, Verse 100

يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓاْ إِن تُطِيعُواْ فَرِيقٗا مِّنَ ٱلَّذِينَ أُوتُواْ ٱلۡكِتَٰبَ يَرُدُّوكُم بَعۡدَ إِيمَٰنِكُمۡ كَٰفِرِينَ١٠٠

yāayyuhā alladhīna āmanū in tuṭīʿū farīqan mina alladhīna ūtū l-kitāba yaruddūkum baʿda īmānikum kāfirīna

O you who have believed, if you obey a party of those who were given the Scripture, they would turn you back, after your belief, [to being] unbelievers.