Quran 33:11 — The Parties (Al-Ahzab)

That is when the believers were truly tested; they were severely shaken up.

[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.

[33:12] The hypocrites and those with doubts in their hearts said, "What GOD and His messenger promised us was no more than an illusion!"