وَدُّواْ لَوْ تَكْفُرُونَ كَمَا كَفَرُواْ فَتَكُونُونَ سَوَاء فَلاَ تَتَّخِذُواْ مِنْهُمْ أَوْلِيَاء حَتَّىَ يُهَاجِرُواْ فِي سَبِيلِ اللّهِ فَإِن تَوَلَّوْاْ فَخُذُوهُمْ وَاقْتُلُوهُمْ حَيْثُ وَجَدتَّمُوهُمْ وَلاَ تَتَّخِذُواْ مِنْهُمْ وَلِيًّا وَلاَ نَصِيرًا
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سورة النساء
(4/89) They yearn that you should disbelieve as they have disbelieved, so that you might be all alike (equal, at the same level); therefore do not take from among them friends until they emigrate in the Way of Allah; but if they turn back, then seize them and kill them wherever you find them. And do not take from among them a friend or a helper.
Surah An-Nisa