وَلَقَدْ كَانُوا عَاهَدُوا اللَّهَ مِنْ قَبْلُ لَا يُوَلُّونَ الْأَدْبَارَ ۚ وَكَانَ عَهْدُ اللَّهِ مَسْئُولًا ١٥
And yet they had already covenanted with Allah not to turn their backs, and a covenant with Allah must (surely) be answered for.
33:16
قُلْ لَنْ يَنْفَعَكُمُ الْفِرَارُ إِنْ فَرَرْتُمْ مِنَ الْمَوْتِ أَوِ الْقَتْلِ وَإِذًا لَا تُمَتَّعُونَ إِلَّا قَلِيلًا ١٦
Say: "Running away will not profit you if ye are running away from death or slaughter; and even if (ye do escape), no more than a brief (respite) will ye be allowed to enjoy!"
33:17
قُلْ مَنْ ذَا الَّذِي يَعْصِمُكُمْ مِنَ اللَّهِ إِنْ أَرَادَ بِكُمْ سُوءًا أَوْ أَرَادَ بِكُمْ رَحْمَةً ۚ وَلَا يَجِدُونَ لَهُمْ مِنْ دُونِ اللَّهِ وَلِيًّا وَلَا نَصِيرًا ١٧
Say: "Who is it that can screen you from Allah if it be His wish to give you punishment or to give you Mercy?" Nor will they find for themselves, besides Allah, any protector or helper.
33:18
قَدْ يَعْلَمُ اللَّهُ الْمُعَوِّقِينَ مِنْكُمْ وَالْقَائِلِينَ لِإِخْوَانِهِمْ هَلُمَّ إِلَيْنَا ۖ وَلَا يَأْتُونَ الْبَأْسَ إِلَّا قَلِيلًا ١٨
Verily Allah knows those among you who keep back (men) and those who say to their brethren, "Come along to us", but come not to the fight except for just a little while.
33:19
أَشِحَّةً عَلَيْكُمْ ۖ فَإِذَا جَاءَ الْخَوْفُ رَأَيْتَهُمْ يَنْظُرُونَ إِلَيْكَ تَدُورُ أَعْيُنُهُمْ كَالَّذِي يُغْشَىٰ عَلَيْهِ مِنَ الْمَوْتِ ۖ فَإِذَا ذَهَبَ الْخَوْفُ سَلَقُوكُمْ بِأَلْسِنَةٍ حِدَادٍ أَشِحَّةً عَلَى الْخَيْرِ ۚ أُولَٰئِكَ لَمْ يُؤْمِنُوا فَأَحْبَطَ اللَّهُ أَعْمَالَهُمْ ۚ وَكَانَ ذَٰلِكَ عَلَى اللَّهِ يَسِيرًا ١٩
Covetous over you. Then when fear comes, thou wilt see them looking to thee, their eyes revolving, like (those of) one over whom hovers death: but when the fear is past, they will smite you with sharp tongues, covetous of goods. Such men have no faith, and so Allah has made their deeds of none effect: and that is easy for Allah.