Surah At-Tawbah, Verse 26

ثُمَّ أَنزَلَ ٱللَّهُ سَكِينَتَهُۥ عَلَىٰ رَسُولِهِۦ وَعَلَى ٱلۡمُؤۡمِنِينَ وَأَنزَلَ جُنُودٗا لَّمۡ تَرَوۡهَا وَعَذَّبَ ٱلَّذِينَ كَفَرُواْۚ وَذَٰلِكَ جَزَآءُ ٱلۡكَٰفِرِينَ٢٦

thumma anzala l-lahu sakīnatahu ʿalā rasūlihi waʿalā l-mu'minīna wa-anzala junūdan lam tarawhā waʿadhaba alladhīna kafarū wadhālika jazāu l-kāfirīna

Then Allāh sent down His tranquility upon His Messenger and upon the believers and sent down soldiers [i.e., angels] whom you did not see and punished those who disbelieved. And that is the recompense of the disbelievers.