فَقاتِل في سَبيلِ اللَّهِ لا تُكَلَّفُ إِلّا نَفسَكَ ۚ وَحَرِّضِ المُؤمِنينَ ۖ عَسَى اللَّهُ أَن يَكُفَّ بَأسَ الَّذينَ كَفَروا ۚ وَاللَّهُ أَشَدُّ بَأسًا وَأَشَدُّ تَنكيلًا

So, fight in the path of God—you are accountable only for yourself—and rouse the believers. Perhaps God will restrain the might of the unbelievers. God is the strongest in enforcing punishment and the most severe in assault.