Quran 21:110 — The Prophets (Al-Anbya')

"He is fully aware of your public utterances, and He is fully aware of everything you conceal.

[21:109] If they turn away, then say, "I have warned you sufficiently, and I have no idea how soon or late (the retribution) will come to you.

[21:111] "For all that I know, this world is a test for you, and a temporary enjoyment."