Surah 11:49
"That is one of the stories of the unseen. We inspired you (with) it. You did not know it, (neither) you nor your people, before (this). So be patient. Surely the outcome (belongs) to the ones who guard (themselves)."
11.49 – That is one of the stories of the unseen. We inspired you (with) it. You did not know it
After the Noah story, the Quran addresses the messenger to state that he did not know the story prior to reciting it. Similar expressions come at 3.44 (after the story of Mary); 12.102 (story of Joseph); and 28.44 (story of Moses). See the analysis of this claim at 28.44.
- from The Quran with Christian Commentary: A Guide to Understanding the Scripture of Islam