Quran 10:38 — Jonah (Younus)

أَم يَقولونَ افتَرىٰهُ ۖ قُل فَأتوا بِسورَةٍ مِثلِهِ وَادعوا مَنِ استَطَعتُم مِن دونِ اللَّهِ إِن كُنتُم صٰدِقينَ

If they say, "He fabricated it," say, "Then produce one sura like these, and invite whomever you wish, other than GOD, if you are truthful."

[10:37] This Quran could not possibly be authored by other than GOD. It confirms all previous messages, and provides a fully detailed scripture. It is infallible, for it comes from the Lord of the universe.

[10:39] Indeed, they have rejected this without studying and examining it, and before understanding it. Thus did those before them disbelieve. Therefore, note the consequences for the transgressors.