وَاقْتُلُوهُمْ حَيْثُ ثَقِفْتُمُوهُمْ وَأَخْرِجُوهُم مِّنْ حَيْثُ أَخْرَجُوكُمْ وَالْفِتْنَةُ أَشَدُّ مِنَ الْقَتْلِ وَلاَ تُقَاتِلُوهُمْ عِندَ الْمَسْجِدِ الْحَرَامِ حَتَّى يُقَاتِلُوكُمْ فِيهِ فَإِن قَاتَلُوكُمْ فَاقْتُلُوهُمْ كَذَلِكَ جَزَاء الْكَافِرِينَ
﴿١٩١﴾
سورة البقرة
(2/191) Kill them (those who started the fight against you) wherever you find (catch) them and drive them out from where they drove you out (Makka), and Al-Fitnah (mischief) is worse (severer) than killing, and do not fight with them near Masjid-i Haram (the Sacred Mosque) unless they start fight with you, but if they do fight (kill) you (there), then fight back (kill). Such is the punishment of the disbelievers.
Surah Al-Baqarah