Surah At-Tawbah, ayah 26

9:26

ثُمَّ أَنزَلَ ٱللَّهُ سَكِينَتَهُۥ عَلَىٰ رَسُولِهِۦ وَعَلَى ٱلۡمُؤۡمِنِينَ وَأَنزَلَ جُنُودٗا لَّمۡ تَرَوۡهَا وَعَذَّبَ ٱلَّذِينَ كَفَرُواْۚ وَذَٰلِكَ جَزَآءُ ٱلۡكَٰفِرِينَ ٢٦

Thumma anzalallāhu sakīnatahū 'alā rasūlihī wa'alal-mu'minīna wa anzala junūdal lam tarawhā wa'addhabal-ladhīna kafarū wadhālika jazā'ul-kāfirīn

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.