Surah An-Nisa' (The Women), Verse 91

سَتَجِدُوْنَ اٰخَرِیْنَ یُرِیْدُوْنَ اَنْ یَّاْمَنُوْكُمْ وَیَاْمَنُوْا قَوْمَهُمْ كُلَّ مَا رُدُّوْۤا اِلَی الْفِتْنَةِ اُرْكِسُوْا فِیْهَا فَاِنْ لَّمْ یَعْتَزِلُوْكُمْ وَیُلْقُوْۤا اِلَیْكُمُ السَّلَمَ وَیَكُفُّوْۤا اَیْدِیَهُمْ فَخُذُوْهُمْ وَاقْتُلُوْهُمْ حَیْثُ ثَقِفْتُمُوْهُمْ وَاُولٰٓىِٕكُمْ جَعَلْنَا لَكُمْ عَلَیْهِمْ سُلْطٰنًا مُّبِیْنًا 

Satajidoona aakhareena yureedoona ai ya'manookum wa ya'manoo qawmahum kullamaa ruddooo ilal fitnati urkisoo feehaa; fa il lam ya'tazilookum wa yulqooo ilai kumus salama wa yakuffooo aidiyahum fakhuzoohum waqtuloohum haisu saqif tumoohum; wa ulaaa'ikum ja'alnaa lakum 'alaihim sultaanam mubeenaa

“Others you will find that wish to gain your confidence as well as that of their people: Every time they are sent back to temptation, they succumb thereto: if they withdraw not from you nor give you (guarantees) of peace besides restraining their hands, seize them and slay them wherever ye get them: In their case We have provided you with a clear argument against them.”

Quran 4:91 (Yusuf Ali Translation)