Quran Al-Fath 48:4
هُوَ ٱلَّذِيٓ أَنزَلَ ٱلسَّكِينَةَ فِي قُلُوبِ ٱلۡمُؤۡمِنِينَ لِيَزۡدَادُوٓاْ إِيمَٰنٗا مَّعَ إِيمَٰنِهِمۡۗ وَلِلَّهِ جُنُودُ ٱلسَّمَٰوَٰتِ وَٱلۡأَرۡضِۚ وَكَانَ ٱللَّهُ عَلِيمًا حَكِيمٗا ٤
Translation
It is He who sent down tranquility into the hearts of the believers that they would increase in faith along with their [present] faith. And to Allāh belong the soldiers of the heavens and the earth, and ever is Allāh Knowing and Wise.