Quran 29:52 — The Spider (Al-'Ankaboot)

Say, "GOD suffices as a witness between me and you. He knows everything in the heavens and the earth. Surely, those who believe in falsehood and disbelieve in GOD are the real losers."

[29:51] Is it not enough of a miracle* that we sent down to you this book, being recited to them? This is indeed a mercy and a reminder for people who believe.

[29:53] They challenge you to bring the retribution! If it were not for a predetermined appointment, the retribution would have come to them immediately. Certainly, it will come to them suddenly, when they least expect it.