Allah sent down the Sakinah into the Hearts of the Believers Allah the Exalted said,هُوَ الَّذِي أَنزَلَ السَّكِينَةَ فِي قُلُوبِ الْمُوْمِنِينَ لِيَزْدَادُوا إِيمَانًا مَّعَ إِيمَانِهِمْHe it is Who sent down As-Sakinah into the hearts of the believers, that they may grow more in faith along with their faith.meaning, tranquility.Qatadah commented,"Grace into the hearts of the believers",that is, the Companions, may Allah be pleased with them, on the Day of Al-Hudaybiyyah.The companions were they, who accepted the call of Allah and His Messenger and obeyed the decisions of Allah and His Messenger. When their hearts felt content with acceptance and were at peace, Allah increased their faith, joining it to the faith they already had.Al-Bukhari, and other Imams, relied on this Ayah as proof that faith increases and decreases in the hearts.Allah the Exalted said next that had He willed, He would have inflicted defeat on the disbelievers, Allah says;وَلِلَّهِ جُنُودُ السَّمَاوَاتِ وَالاَْرْضِAnd to Allah belong the armies of the heavens and the earth,and had He willed to send only one angel to them, that angel would have brought destruction to all what they had. However, Allah the Exalted willed Jihad and fighting to be established for, and by, the believers for great wisdom, clear reasons and unequivocal evidences that He had in all this.This is why Allah the Great said next,وَكَانَ اللَّهُ عَلِيمًا حَكِيمًاand Allah is Ever All-Knower, All-Wise.Allah the Exalted and Most Honored said