An-Nisa' - 4:144

يَا أَيُّهَا الَّذِينَ آمَنُواْ لاَ تَتَّخِذُواْ الْكَافِرِينَ أَوْلِيَاء مِن دُونِ الْمُؤْمِنِينَ أَتُرِيدُونَ أَن تَجْعَلُواْ لِلّهِ عَلَيْكُمْ سُلْطَانًا مُّبِينًا
[4:144]
O you who believe! do not take the unbelievers for friends rather than the believers; do you desire that you should give to Allah a manifest proof against yourselves?
O ye who believe! Take not for friends unbelievers rather than believers: Do ye wish to offer Allah an open proof against yourselves?
O ye who believe! Choose not disbelievers for (your) friends in place of believers. Would ye give Allah a clear warrant against you?