AN NISAA' — Ayat 91

سَتَجِدُونَ آخَرِينَ يُرِيدُونَ أَن يَأْمَنُوكُمْ وَيَأْمَنُواْ قَوْمَهُمْ كُلَّ مَا رُدُّوَاْ إِلَى الْفِتْنِةِ أُرْكِسُواْ فِيِهَا فَإِن لَّمْ يَعْتَزِلُوكُمْ وَيُلْقُواْ إِلَيْكُمُ السَّلَمَ وَيَكُفُّوَاْ أَيْدِيَهُمْ فَخُذُوهُمْ وَاقْتُلُوهُمْ حَيْثُ ثِقِفْتُمُوهُمْ وَأُوْلَـئِكُمْ جَعَلْنَا لَكُمْ عَلَيْهِمْ سُلْطَانًا مُّبِينًا

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.