killing only during hostilities in progress

Al-Baqarah 2:191

وَٱقۡتُلُوهُمۡ حَيۡثُ ثَقِفۡتُمُوهُمۡ وَأَخۡرِجُوهُم مِّنۡ حَيۡثُ أَخۡرَجُوكُمۡۚ وَٱلۡفِتۡنَةُ أَشَدُّ مِنَ ٱلۡقَتۡلِۚ وَلَا تُقَٰتِلُوهُمۡ عِندَ ٱلۡمَسۡجِدِ ٱلۡحَرَامِ حَتَّىٰ يُقَٰتِلُوكُمۡ فِيهِۖ فَإِن قَٰتَلُوكُمۡ فَٱقۡتُلُوهُمۡۗ كَذَٰلِكَ جَزَآءُ ٱلۡكَٰفِرِينَ ١٩١

And kill them wherever you overtake them and expel them from wherever they have expelled you, and fitnah is worse than killing. And do not fight them at al-Masjid al- Haram until they fight you there. But if they fight you, then kill them. Such is the recompense of the disbelievers.

An-Nisā’ 4:89

وَدُّواْ لَوۡ تَكۡفُرُونَ كَمَا كَفَرُواْ فَتَكُونُونَ سَوَآءٗۖ فَلَا تَتَّخِذُواْ مِنۡهُمۡ أَوۡلِيَآءَ حَتَّىٰ يُهَاجِرُواْ فِي سَبِيلِ ٱللَّهِۚ فَإِن تَوَلَّوۡاْ فَخُذُوهُمۡ وَٱقۡتُلُوهُمۡ حَيۡثُ وَجَدتُّمُوهُمۡۖ وَلَا تَتَّخِذُواْ مِنۡهُمۡ وَلِيّٗا وَلَا نَصِيرًا ٨٩

They wish you would disbelieve as they disbelieved so you would be alike. So do not take from among them allies until they emigrate for the cause of Allah. But if they turn away, then seize them and kill them wherever you find them and take not from among them any ally or helper.

An-Nisā’ 4:91

سَتَجِدُونَ ءَاخَرِينَ يُرِيدُونَ أَن يَأۡمَنُوكُمۡ وَيَأۡمَنُواْ قَوۡمَهُمۡ كُلَّ مَا رُدُّوٓاْ إِلَى ٱلۡفِتۡنَةِ أُرۡكِسُواْ فِيهَاۚ فَإِن لَّمۡ يَعۡتَزِلُوكُمۡ وَيُلۡقُوٓاْ إِلَيۡكُمُ ٱلسَّلَمَ وَيَكُفُّوٓاْ أَيۡدِيَهُمۡ فَخُذُوهُمۡ وَٱقۡتُلُوهُمۡ حَيۡثُ ثَقِفۡتُمُوهُمۡۚ وَأُوْلَٰٓئِكُمۡ جَعَلۡنَا لَكُمۡ عَلَيۡهِمۡ سُلۡطَٰنٗا مُّبِينٗا ٩١

You will find others who wish to obtain security from you and [to] obtain security from their people. Every time they are returned to [the influence of] disbelief, they fall back into it. So if they do not withdraw from you or offer you peace or restrain their hands, then seize them and kill them wherever you overtake them. And those - We have made for you against them a clear authorization.

Al-Mā’idah 5:33

إِنَّمَا جَزَٰٓؤُاْ ٱلَّذِينَ يُحَارِبُونَ ٱللَّهَ وَرَسُولَهُۥ وَيَسۡعَوۡنَ فِي ٱلۡأَرۡضِ فَسَادًا أَن يُقَتَّلُوٓاْ أَوۡ يُصَلَّبُوٓاْ أَوۡ تُقَطَّعَ أَيۡدِيهِمۡ وَأَرۡجُلُهُم مِّنۡ خِلَٰفٍ أَوۡ يُنفَوۡاْ مِنَ ٱلۡأَرۡضِۚ ذَٰلِكَ لَهُمۡ خِزۡيٞ فِي ٱلدُّنۡيَاۖ وَلَهُمۡ فِي ٱلۡأٓخِرَةِ عَذَابٌ عَظِيمٌ ٣٣

Indeed, the penalty for those who wage war against Allah and His Messenger and strive upon earth [to cause] corruption is none but that they be killed or crucified or that their hands and feet be cut off from opposite sides or that they be exiled from the land. That is for them a disgrace in this world; and for them in the Hereafter is a great punishment,

Al-Anfāl 8:39

وَقَٰتِلُوهُمۡ حَتَّىٰ لَا تَكُونَ فِتۡنَةٞ وَيَكُونَ ٱلدِّينُ كُلُّهُۥ لِلَّهِۚ فَإِنِ ٱنتَهَوۡاْ فَإِنَّ ٱللَّهَ بِمَا يَعۡمَلُونَ بَصِيرٞ ٣٩

And fight them until there is no fitnah and [until] the religion, all of it, is for Allah. And if they cease - then indeed, Allah is Seeing of what they do.

Al-Anfāl 8:57

فَإِمَّا تَثۡقَفَنَّهُمۡ فِي ٱلۡحَرۡبِ فَشَرِّدۡ بِهِم مَّنۡ خَلۡفَهُمۡ لَعَلَّهُمۡ يَذَّكَّرُونَ ٥٧

So if you, [O Muhammad], gain dominance over them in war, disperse by [means of] them those behind them that perhaps they will be reminded.

At-Taubah 9:5

فَإِذَا ٱنسَلَخَ ٱلۡأَشۡهُرُ ٱلۡحُرُمُ فَٱقۡتُلُواْ ٱلۡمُشۡرِكِينَ حَيۡثُ وَجَدتُّمُوهُمۡ وَخُذُوهُمۡ وَٱحۡصُرُوهُمۡ وَٱقۡعُدُواْ لَهُمۡ كُلَّ مَرۡصَدٖۚ فَإِن تَابُواْ وَأَقَامُواْ ٱلصَّلَوٰةَ وَءَاتَوُاْ ٱلزَّكَوٰةَ فَخَلُّواْ سَبِيلَهُمۡۚ إِنَّ ٱللَّهَ غَفُورٞ رَّحِيمٞ ٥

And when the sacred months have passed, then kill the polytheists wherever you find them and capture them and besiege them and sit in wait for them at every place of ambush. But if they should repent, establish prayer, and give zakah, let them [go] on their way. Indeed, Allah is Forgiving and Merciful.

At-Taubah 9:12

وَإِن نَّكَثُوٓاْ أَيۡمَٰنَهُم مِّنۢ بَعۡدِ عَهۡدِهِمۡ وَطَعَنُواْ فِي دِينِكُمۡ فَقَٰتِلُوٓاْ أَئِمَّةَ ٱلۡكُفۡرِ إِنَّهُمۡ لَآ أَيۡمَٰنَ لَهُمۡ لَعَلَّهُمۡ يَنتَهُونَ ١٢

And if they break their oaths after their treaty and defame your religion, then fight the leaders of disbelief, for indeed, there are no oaths [sacred] to them; [fight them that] they might cease.