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 the faithless because of their ascribing partners to Allah, for which He has not sent down any authority, and their refuge shall be the Fire, and evil is the [final] abode of the wrongdoers.
Agha Ali Puya Commentary
Commentary on Quran 3:151
[Pooya/Ali Commentary 3:151] The events of the battle of Uhad described in the commentary of verses 121 and 122 should be carefully studied to understand the meaning of the "terror" Allah had cast into the hearts of the disbelievers. It was through Ali (yadullah-the hand of Allah) that the Almighty turned the Makkans, after their show of a victory, into a terror-stricken bunch of rats, hastily fleeing to Hamra ul Asad-a curious sight indeed of a "victorious" army in humiliating retreat instead of advancing to Madina to lay it in ruins.