Sura al-Baqara 2:217

يَسْـَٔلُونَكَ عَنِ ٱلشَّهْرِ ٱلْحَرَامِ قِتَالٍ فِيهِ قُلْ قِتَالٌ فِيهِ كَبِيرٌ وَصَدٌّ عَن سَبِيلِ ٱللَّـهِ وَكُفْرٌۢ بِهِۦ وَٱلْمَسْجِدِ ٱلْحَرَامِ وَإِخْرَاجُ أَهْلِهِۦ مِنْهُ أَكْبَرُ عِندَ ٱللَّـهِ وَٱلْفِتْنَةُ أَكْبَرُ مِنَ ٱلْقَتْلِ وَلَا يَزَالُونَ يُقَٰتِلُونَكُمْ حَتَّىٰ يَرُدُّوكُمْ عَن دِينِكُمْ إِنِ ٱسْتَطَٰعُوا۟ وَمَن يَرْتَدِدْ مِنكُمْ عَن دِينِهِۦ فَيَمُتْ وَهُوَ كَافِرٌ فَأُو۟لَٰٓئِكَ حَبِطَتْ أَعْمَٰلُهُمْ فِى ٱلدُّنْيَا وَٱلْأَخِرَةِ وَأُو۟لَٰٓئِكَ أَصْحَٰبُ ٱلنَّارِ هُمْ فِيهَا خَٰلِدُونَ

yasʾalūnaka ʿani l-shahri l-ḥarāmi qitālin fīhi qul qitālun fīhi kabīrun waṣaddun ʿan sabīli allāhi wa-kufrun bihi wa-l-masjidi l-ḥarāmi waikhrāju ahlihi minhu akbaru ʿinda allāhi wa-l-fitnatu akbaru mina l-qatli wa-lā yazālūna yuqātilūnakum ḥattā yaruddūkum ʿan dīnikum ini istaṭāʿū wa-man yartadid minkum ʿan dīnihi fa-yamut wa-huwa kāfirun fa-ūlāʾika ḥabiṭat aʿmāluhum fī l-dunyā wa-l-akhirati wa-ūlāʾika aṣḥābu l-nāri hum fīhā khālidūna

They ask thee concerning fighting in the Prohibited Month. Say: "Fighting therein is a grave (offence); but graver is it in the sight of Allah to prevent access to the path of Allah, to deny Him, to prevent access to the Sacred Mosque, and drive out its members." Tumult and oppression are worse than slaughter. Nor will they cease fighting you until they turn you back from your faith if they can. And if any of you Turn back from their faith and die in unbelief, their works will bear no fruit in this life and in the Hereafter; they will be companions of the Fire and will abide therein.