At Tawbah Ayah 13

أَلَا تُقَـٰتِلُونَ قَوْمًا نَّكَثُوٓاْ أَيْمَـٰنَهُمْ وَهَمُّواْ بِإِخْرَاجِ ٱلرَّسُولِ وَهُم بَدَءُوكُمْ أَوَّلَ مَرَّةٍ‌ۚ أَتَخْشَوْنَهُمْ‌ۚ فَٱللَّهُ أَحَقُّ أَن تَخْشَوْهُ إِن كُنتُم مُّؤْمِنِينَ ١٣ Will you not fight those who have broken their oaths, conspired to expel the Messenger ?from Mecca?, and attacked you first? Do you fear them? Allah is more deserving of your fear, if you are ?true? believers.