Quran 7:3 — The Purgatory (Al-A'araf)

You shall all follow what is revealed to you from your Lord; do not follow any idols besides Him. Rarely do you take heed.

[7:2] This scripture has been revealed to you—you shall not harbor doubt about it in your heart—that you may warn with it, and to provide a reminder for the believers.

[7:4] Many a community we annihilated; they incurred our retribution while they were asleep, or wide awake.