سَنُلْقِى فِى قُلُوبِ ٱلَّذِينَ كَفَرُوا۟ ٱلرُّعْبَ بِمَآ أَشْرَكُوا۟ بِٱللَّهِ مَا لَمْ يُنَزِّلْ بِهِۦ سُلْطَٰنًۭا ۖ وَمَأْوَىٰهُمُ ٱلنَّارُ ۚ وَبِئْسَ مَثْوَى ٱلظَّٰلِمِينَ
We will cast terror into the hearts of those who disbelieve for what they have associated with Allah of which He had not sent down [any] authority. And their refuge will be the Fire, and wretched is the residence of the wrongdoers.
O you who believe! If you obey those who disbelieve, they will send you back on your heels, and you will turn back as losers (149)Nay, Allah is your protector, and He is the best of helpers (150)We shall cast terror into the hearts of those who disbelieve, because they joined others in worship with Allah, for which He sent no authority; their abode will be the Fire and how evil is the abode of the wrongdoers (151)And Allah did indeed fulfill His promise to you when you were killing them (your enemy) with His permission; until Fashiltum and fell to disputing about the order, and disobeyed after He showed you what you love. Among you are some that desire this world and some that desire the Hereafter. Then He made you flee from them, that He might test you. But surely, He forgave you, and Allah is Most Gracious to the believers (152)(And remember) when you ran away without even casting a side glance at anyone, and the Messenger was in your rear calling you back. There did Allah give you one distress after another by way of requital, to teach you not to grieve for that which had escaped you, nor for what struck you. And Allah is Well-Aware of all that you do (153)
The Prohibition of Obeying the Disbelievers; the Cause of Defeat at Uhud
Allah warns His believing servants against obeying the disbelievers and hypocrites, because such obedience leads to utter destruction in this life and the Hereafter. This is why Allah said,
إِن تُطِيعُوا الَّذِينَ كَفَرُوا يَرُدُّوكُمْ عَلَىٰ أَعْقَابِكُمْ فَتَنقَلِبُوا خَاسِرِينَ
(If you obey those who disbelieve, they will send you back on your heels, and you will turn back (from faith) as losers)[3:149].
Allah also commands the believers to obey Him, take Him as their protector, seek His aid and trust in Him. Allah said,
بَلِ اللَّهُ مَوْلَاكُمْ وَهُوَ خَيْرُ النَّاصِرِينَ
(Nay, Allah is your protector, and He is the best of helpers).
Allah next conveys the good news that He will put fear of the Muslims, and feelings of subordination to the Muslims in the hearts of their disbelieving enemies, because of their Kufr and Shirk. And Allah has prepared torment and punishment for them in the Hereafter. Allah said,
سَنُلْقِي فِي قُلُوبِ الَّذِينَ كَفَرُوا الرُّعْبَ بِمَا أَشْرَكُوا بِاللَّهِ مَا لَمْ يُنَزِّلْ بِهِ سُلْطَانًا وَمَأْوَاهُمُ النَّارُ وَبِئْسَ مَثْوَى الظَّالِمِينَ
(We shall cast terror into the hearts of those who disbelieve, because they joined others in worship with Allah, for which He sent no authority; their abode will be the Fire and how evil is the abode of the wrongdoers).
In addition, the Two Sahihs recorded that Jabir bin 'Abdullah said that the Messenger of Allah ﷺ said,
أُعْطِيتُ خَمْسًا لَمْ يُعْطَهُنَّ أَحَدٌ مِنَ الْأَنْبِيَاءِ قَبْلِي: نُصِرْتُ بِالرُّعْبِ مَسِيرَةَ شَهْرٍ، وَجُعِلَتْ لِيَ الْأَرْضُ مَسْجِدًا وَطَهُورًا، وَأُحِلَّتْ لِيَ الْغَنَائِمُ، وَأُعْطِيتُ الشَّفَاعَةَ، وَكَانَ النَّبِيُّ يُبْعَثُ إِلى قَوْمِهِ خَاصَّةً وَبُعِثْتُ إِلى النَّاسِ عَامَّةً
(I was given five things that no other Prophet before me was given. I was aided with fear the distance of one month, the earth was made a Masjid and clean place for me, I was allowed war booty, I was given the …