Surah Al-Ahzab — Ayah 9 (33:9)
يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُواْ ٱذۡكُرُواْ نِعۡمَةَ ٱللَّهِ عَلَيۡكُمۡ إِذۡ جَآءَتۡكُمۡ جُنُودٞ فَأَرۡسَلۡنَا عَلَيۡهِمۡ رِيحٗا وَجُنُودٗا لَّمۡ تَرَوۡهَاۚ وَكَانَ ٱللَّهُ بِمَا تَعۡمَلُونَ بَصِيرًا ٩
English translation (Saheeh International)
O you who have believed, remember the favor of Allāh upon you when armies came to [attack] you and We sent upon them a wind and armies [of angels] you did not see. And ever is Allāh, of what you do, Seeing.
Brief commentary
O those who have faith in Allah and practice what He has legislated, remember Allah’s favour on you when the armies of the disbelievers came to Madina, prepared to fight you, and the hypocrites and Jews supported them. Then I sent upon them the eastern winds through which the Prophet (peace be upon him) was helped, and I sent armies of angels you did not see. Then the disbelievers turned away fleeing, not being able to do anything. And Allah is Seeing what you do. None of that is hidden from Him and He shall reward you for that.