﴿ هُوَ ٱلَّذِىٓ أَنزَلَ ٱلسَّكِينَةَ فِى قُلُوبِ ٱلْمُؤْمِنِينَ لِيَزْدَادُوٓا۟ إِيمَٰنًۭا مَّعَ إِيمَٰنِهِمْ ۗ وَلِلَّهِ جُنُودُ ٱلسَّمَٰوَٰتِ وَٱلْأَرْضِ ۚ وَكَانَ ٱللَّهُ عَلِيمًا حَكِيمًۭا ﴾

“It is He who from on high has bestowed inner peace upon the hearts of the believers, so that - seeing that God’s are all the forces of the heavens and the earth, and that God is all-knowing, truly wise - they might grow yet more firm in their faith;”

(He it is Who sent down peace of reassurance) tranquillity (into the hearts of the believers) into the hearts of true believers on the day of al-Hudaybiyyah (that they might add faith) that they might add certainty, belief and knowledge (unto their faith) in Allah and His Messenger. (Allah's are the hosts of the heavens) the angels (and the earth) the believers and He sets them on whoever He will among His enemies, (and Allah is ever Knower) of what He has done to you: victory, forgiveness, guidance, help and sending down tranquillity into the hearts of the believers, (Wise) regarding that which He has done with you.