Al-Ma'idah 5:51
۞ يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ لَا تَتَّخِذُوا۟ ٱلْيَهُودَ وَٱلنَّصَـٰرَىٰٓ أَوْلِيَآءَ ۘ بَعْضُهُمْ أَوْلِيَآءُ بَعْضٍ ۚ وَمَن يَتَوَلَّهُم مِّنكُمْ فَإِنَّهُۥ مِنْهُمْ ۗ إِنَّ ٱللَّهَ لَا يَهْدِى ٱلْقَوْمَ ٱلظَّـٰلِمِينَ
Ya ayyuha allatheena amanoola tattakhithoo alyahooda wannasaraawliyaa baAAduhum awliyao baAAdinwaman yatawallahum minkum fa-innahu minhum inna Allaha layahdee alqawma aththalimeen
O you who have believed, do not take the Jews and the Christians as allies. They are [in fact] allies of one another. And whoever is an ally to them among you - then indeed, he is [one] of them. Indeed, Allāh guides not the wrongdoing people.
O you who believe, do not take the Jews and the Christians for intimate friends. They are friends to each other. Whoever takes them as intimate friends is one of them. Surely, Allah does not take the unjust people to the right path.