Quran 5:61 — The Feast (Al-Ma'edah)

When they come to you, they say, "We believe," even though they were full of disbelief when they entered, and they are full of disbelief when they leave. GOD is fully aware of everything they conceal.

[5:60] Say, "Let me tell you who are worse in the sight of GOD: those who are condemned by GOD after incurring His wrath until He made them (as despicable as) monkeys and pigs, and the idol worshipers. These are far worse, and farther from the right path."

[5:62] You see many of them readily committing evil and transgression, and eating from illicit earnings. Miserable indeed is what they do.