Quran 7:20 — The Purgatory (Al-A'araf)

The devil whispered to them, in order to reveal their bodies, which were invisible to them. He said, "Your Lord did not forbid you from this tree, except to prevent you from becoming angels, and from attaining eternal existence."

[7:19] "As for you, Adam, dwell with your wife in Paradise, and eat therefrom as you please, but do not approach this one tree, lest you fall in sin."

[7:21] He swore to them, "I am giving you good advice."