Surah Ali 'Imran 3:151

سَنُلْقِى فِى قُلُوبِ ٱلَّذِينَ كَفَرُوا۟ ٱلرُّعْبَ بِمَآ أَشْرَكُوا۟ بِٱللَّهِ مَا لَمْ يُنَزِّلْ بِهِۦ سُلْطَـٰنًا ۖ وَمَأْوَىٰهُمُ ٱلنَّارُ ۚ وَبِئْسَ مَثْوَى ٱلظَّـٰلِمِينَ

We will cast terror into the hearts of those who disbelieve for what they have associated with Allāh of which He had not sent down [any] authority. And their refuge will be the Fire, and wretched is the residence of the wrongdoers.

Translation: Saheeh International

Tafsir

We will cast terror read ru‘b or ru‘ub into the hearts of the disbelievers after departing from Uhud they resolved to return in order to exterminate the Muslims but they were terrified and did not return; …

Excerpt from Tafsir al-Jalalayn, commentary on 3:151, via Quran.com. The reader has the full commentary and 9 more tafsirs.