Surah 9 : Ayah 13

أَلَا تُقَـٰتِلُونَ قَوْمًا نَّكَثُوٓا۟ أَيْمَـٰنَهُمْ وَهَمُّوا۟ بِإِخْرَاجِ ٱلرَّسُولِ وَهُم بَدَءُوكُمْ أَوَّلَ مَرَّةٍ ۚ أَتَخْشَوْنَهُمْ ۚ فَٱللَّهُ أَحَقُّ أَن تَخْشَوْهُ إِن كُنتُم مُّؤْمِنِينَ

Will you not fight people who broke their oaths, conspired to expel the Messenger[14], and initiated the war against you first[15]? Do you fear them? Rather it is Allah Whom you should fear, if you are [truly] believers.