Surah Al-Baqarah, Verse 120

وَلَن تَرۡضَىٰ عَنكَ ٱلۡيَهُودُ وَلَا ٱلنَّصَٰرَىٰ حَتَّىٰ تَتَّبِعَ مِلَّتَهُمۡۗ قُلۡ إِنَّ هُدَى ٱللَّهِ هُوَ ٱلۡهُدَىٰۗ وَلَئِنِ ٱتَّبَعۡتَ أَهۡوَآءَهُم بَعۡدَ ٱلَّذِي جَآءَكَ مِنَ ٱلۡعِلۡمِ مَا لَكَ مِنَ ٱللَّهِ مِن وَلِيّٖ وَلَا نَصِيرٍ١٢٠

walan tarḍā ʿanka l-yahūdu walā l-naṣārā ḥattā tattabiʿa millatahum qul inna hudā l-lahi huwa l-hudā wala-ini ittabaʿta ahwāahum baʿda alladhī jāaka mina l-ʿil'mi mā laka mina l-lahi min waliyyin walā naṣīrin

And never will the Jews and the Christians approve of you until you follow their religion. Say, "Indeed, the guidance of Allāh is the [only] guidance." If you were to follow their desires after what has come to you of knowledge, you would have against Allāh no protector or helper.