Quran 33:9 — The Parties (Al-Ahzab)

O you who believe, remember GOD's blessing upon you; when soldiers attacked you, we sent upon them violent wind and invisible soldiers. GOD is Seer of everything you do.

[33:8] Subsequently, He will surely question the truthful about their truthfulness, and has prepared for the disbelievers (in this Quranic fact) a painful retribution.

[33:10] When they came from above you, and from beneath you, your eyes were terrified, your hearts ran out of patience, and you harbored unbefitting thoughts about GOD.