Qur'an 33:9

يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ ٱذْكُرُوا۟ نِعْمَةَ ٱللَّهِ عَلَيْكُمْ إِذْ جَآءَتْكُمْ جُنُودٌ فَأَرْسَلْنَا عَلَيْهِمْ رِيحًا وَجُنُودًا لَّمْ تَرَوْهَا ۚ وَكَانَ ٱللَّهُ بِمَا تَعْمَلُونَ بَصِيرًا

“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.”

Al-Ahzaab 33:9 · Saheeh International