Quran

أَلَا تُقَٰتِلُونَ قَوۡمٗا نَّكَثُوٓاْ أَيۡمَٰنَهُمۡ وَهَمُّواْ بِإِخۡرَاجِ ٱلرَّسُولِ وَهُم بَدَءُوكُمۡ أَوَّلَ مَرَّةٍۚ أَتَخۡشَوۡنَهُمۡۚ فَٱللَّهُ أَحَقُّ أَن تَخۡشَوۡهُ إِن كُنتُم مُّؤۡمِنِينَ

Would you not fight a people who broke their oaths and determined to expel the Messenger, and they had begun [the attack upon] you the first time? Do you fear them? But Allah has more right that you should fear Him, if you are [truly] believers