﴿ يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓا۟ إِن تَنصُرُوا۟ ٱللَّهَ يَنصُرْكُمْ وَيُثَبِّتْ أَقْدَامَكُمْ ﴾

“O you who have attained to faith! If you help [the cause of] God, He will help you, and will make firm your steps;”

(O ye who believe) in Muhammad (pbuh) and the Qur'an! (If ye help Allah, He will help you) if you help Allah's Prophet, Muhammad (pbuh) in fighting against the enemy, Allah will help you to conquer this enemy (and will make your foothold firm) in fighting so that you do not swerve.