Quran 7:30 — The Purgatory (Al-A'araf)

Some He guided, while others are committed to straying. They have taken the devils as their masters, instead of GOD, yet they believe that they are guided.

[7:29] Say, "My Lord advocates justice, and to stand devoted to Him alone at every place of worship. You shall devote your worship absolutely to Him alone. Just as He initiated you, you will ultimately go back to Him."

[7:31] O children of Adam, you shall be clean and dress nicely when you go to the masjid. And eat and drink moderately. Surely, He does not love the gluttons.