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
If you help him (Muhammad SAW) not (it does not matter), for Allah did indeed help him when the disbelievers drove him out, the second of two, when they (Muhammad SAW and Abu Bakr) were in the cave, and he (SAW) said to his companion (Abu Bakr): "Be not sad (or afraid), surely Allah is with us." Then Allah sent down His Sakinah (calmness, tranquillity, peace, etc.) upon him, and strengthened him with forces (angels) which you saw not, and made the word of those who disbelieved the lowermost, while it was the Word of Allah that became the uppermost, and Allah is All-Mighty, All-Wise.
ٱنفِرُواْ خِفَافٗا وَثِقَالٗا وَجَٰهِدُواْ بِأَمۡوَٰلِكُمۡ وَأَنفُسِكُمۡ فِي سَبِيلِ ٱللَّهِۚ ذَٰلِكُمۡ خَيۡرٞ لَّكُمۡ إِن كُنتُمۡ تَعۡلَمُونَ
March forth, whether you are light (being healthy, young and wealthy) or heavy (being ill, old and poor), strive hard with your wealth and your lives in the Cause of Allah. This is better for you, if you but knew.
لَوۡ كَانَ عَرَضٗا قَرِيبٗا وَسَفَرٗا قَاصِدٗا لَّٱتَّبَعُوكَ وَلَٰكِنۢ بَعُدَتۡ عَلَيۡهِمُ ٱلشُّقَّةُۚ وَسَيَحۡلِفُونَ بِٱللَّهِ لَوِ ٱسۡتَطَعۡنَا لَخَرَجۡنَا مَعَكُمۡ يُهۡلِكُونَ أَنفُسَهُمۡ وَٱللَّهُ يَعۡلَمُ إِنَّهُمۡ لَكَٰذِبُونَ
Had it been a near gain (booty in front of them) and an easy journey, they would have followed you, but the distance (Tabuk expedition) was long for them, and they would swear by Allah, "If we only could, we would certainly have come forth with you." They destroy their ownselves, and Allah knows that they are liars.