Sura al-Fatḥ 48:4

هُوَ ٱلَّذِىٓ أَنزَلَ ٱلسَّكِينَةَ فِى قُلُوبِ ٱلْمُؤْمِنِينَ لِيَزْدَادُوٓا۟ إِيمَٰنًا مَّعَ إِيمَٰنِهِمْ وَلِلَّەِ جُنُودُ ٱلسَّمَٰوَٰتِ وَٱلْأَرْضِ وَكَانَ ٱللَّـهُ عَلِيمًا حَكِيمًا

huwa alladhī anzala l-sakīnata fī qulūbi l-muʾminīna li-yazdādū īmānan maʿa īmānihim wa-lillahi junūdu l-samāwāti wa-l-arḍi wa-kāna allāhu ʿalīman ḥakīman

It is He Who sent down tranquillity into the hearts of the Believers, that they may add faith to their faith;- for to Allah belong the Forces of the heavens and the earth; and Allah is Full of Knowledge and Wisdom;-