An-Nisa 4:91

Satajidoona akhareena yureedoona anya/manookum waya/manoo qawmahum kulla ma ruddoo ilaalfitnati orkisoo feeha fa-in lam yaAAtazilookum wayulqooilaykumu assalama wayakuffoo aydiyahum fakhuthoohumwaqtuloohum haythu thaqiftumoohum waola-ikumjaAAalna lakum AAalayhim sultanan mubeena

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.

You will find others who want to be secure from you, and secure from their own people. (But) whenever they are called back to the mischief, they are plunged into it. So, if they do not stay away from you, and do not offer peace to you, and do not restrain their hands, then seize them, and kill them wherever you find them, and, We have given you an open authority against them.