وَإِن نَّكَثُواْ أَيْمَانَهُم مِّن بَعْدِ عَهْدِهِمْ وَطَعَنُواْ فِي دِينِكُمْ فَقَاتِلُواْ أَئِمَّةَ الْكُفْرِ إِنَّهُمْ لاَ أَيْمَانَ لَهُمْ لَعَلَّهُمْ يَنتَهُونَ
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سورة التوبة
(9/12) And if they violate their oaths after their covenant and revile your religion, fight those leaders of infidelity-verily no oaths will hold in their case that haply they may desist.
Surah At-Tawbah