Sura al-Tawbah 9:5

فَإِذَا ٱنسَلَخَ ٱلْأَشْهُرُ ٱلْحُرُمُ فَٱقْتُلُوا۟ ٱلْمُشْرِكِينَ حَيْثُ وَجَدتُّمُوهُمْ وَخُذُوهُمْ وَٱحْصُرُوهُمْ وَٱقْعُدُوا۟ لَهُمْ كُلَّ مَرْصَدٍ فَإِن تَابُوا۟ وَأَقَامُوا۟ ٱلصَّلَوٰةَ وَءَاتَوُا۟ ٱلزَّكَوٰةَ فَخَلُّوا۟ سَبِيلَهُمْ إِنَّ ٱللَّـهَ غَفُورٌ رَّحِيمٌ

fa-idhā nsalakha l-ashhuru l-ḥurumu faqtulū l-mushrikīna ḥaythu wa-jadttumūhum wa-khudhūhum wa-aḥṣurūhum wa-aqʿudū lahum kulla marṣadin fa-in tābū wa-aqāmū l-ṣalāta wa-ātawu l-zakāta fakhallū sabīlahum inna allāha ghafūrun raḥīmun

But when the forbidden months are past, then fight and slay the Pagans wherever ye find them, an seize them, beleaguer them, and lie in wait for them in every stratagem (of war); but if they repent, and establish regular prayers and practise regular charity, then open the way for them: for Allah is Oft-forgiving, Most Merciful.