The Quran

وَدّوا لَو تَكفُرونَ كَما كَفَروا فَتَكونونَ سَواءً ۖ فَلا تَتَّخِذوا مِنهُم أَولِياءَ حَتّىٰ يُهاجِروا في سَبيلِ اللَّهِ ۚ فَإِن تَوَلَّوا فَخُذوهُم وَاقتُلوهُم حَيثُ وَجَدتُموهُم ۖ وَلا تَتَّخِذوا مِنهُم وَلِيًّا وَلا نَصيرًا

Muhammad Asad

They would love to see you deny the truth even as they have denied it, so that you should be like them. Do not, therefore, take them for your allies until they forsake the domain of evil¹ for the sake of God; and if they revert to [open] enmity, seize them and slay them wherever you may find them. And do not take any of them² for your ally or giver of succour,

See surah 2, verse 218, as well as note on verse 97 of this surah.
I.e., any of those who have not "forsaken the domain of evil" and are wavering between belief and disbelief.