Surah At-Tawbah, ayah 40

إِلَّا تَنصُرُوهُ فَقَدۡ نَصَرَهُ ٱللَّهُ إِذۡ أَخۡرَجَهُ ٱلَّذِينَ كَفَرُواْ ثَانِيَ ٱثۡنَيۡنِ إِذۡ هُمَا فِي ٱلۡغَارِ إِذۡ يَقُولُ لِصَٰحِبِهِۦ لَا تَحۡزَنۡ إِنَّ ٱللَّهَ مَعَنَاۖ فَأَنزَلَ ٱللَّهُ سَكِينَتَهُۥ عَلَيۡهِ وَأَيَّدَهُۥ بِجُنُودٖ لَّمۡ تَرَوۡهَا وَجَعَلَ كَلِمَةَ ٱلَّذِينَ كَفَرُواْ ٱلسُّفۡلَىٰۗ وَكَلِمَةُ ٱللَّهِ هِيَ ٱلۡعُلۡيَاۗ وَٱللَّهُ عَزِيزٌ حَكِيمٌ ٤٠

Illā tansurūhu faqad nasarahullāhu idh akhrajahul-ladhīna kafarū thāniyathnayni idh humā fil-ghāri idh yaqūlu lisāhibihī lā tahzan innallāha ma'anā fa anzalallāhu sakīnatahū 'alayhi wa ayyadahū bijunūdil lam tarawhā waja'ala kalimatal-ladhīna kafarus-suflā wakalimatullāhi hiyal-'ulyā wallāhu 'azīzun hakīm

If you do not aid him [i.e., the Prophet (ﷺ)] - Allāh has already aided him when those who disbelieved had driven him out [of Makkah] as one of two,⁴⁷⁶ when they were in the cave and he [i.e., Muḥammad (ﷺ)] said to his companion, "Do not grieve; indeed Allāh is with us." And Allāh sent down His tranquility upon him and supported him with soldiers [i.e., angels] you did not see and made the word⁴⁷⁷ of those who disbelieved the lowest,⁴⁷⁸ while the word of Allāh⁴⁷⁹ - that is the highest. And Allāh is Exalted in Might and Wise.