They wish that you disbelieve as they have disbelieved, then you become equal. Do not consider them friends, unless they mobilize along with you in the cause of God. If they turn against you, you shall fight them, and you may kill them when you encounter them in war. You shall not accept them as friends, or allies.*
وَدّوا لَو تَكفُرونَ كَما كَفَروا فَتَكونونَ سَواءً فَلا تَتَّخِذوا مِنهُم أَولِياءَ حَتّىٰ يُهاجِروا فى سَبيلِ اللَّهِ فَإِن تَوَلَّوا فَخُذوهُم وَاقتُلوهُم حَيثُ وَجَدتُموهُم وَلا تَتَّخِذوا مِنهُم وَلِيًّا وَلا نَصيرًا
waddoo law takfuroona kamaa kafaroo fatakoonoona sawaaa’an falaa tattakhizoo minhum awliyaaa’a hattaa yuhaajiroo fee sabeelil laah; fa in tawallaw fa khuzoohum waqtuloohum haisu wajat tumoohum wa laa tattakhizoo minhum waliyyanw wa laa naseeraa
*4:89 The basic rule controlling all fighting is stated in 60:8-9.