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dhālika min ʾanbāʾi l-ghaybi nūḥīhi ʾilayka wa-mā kunta ladayhim ʾidh ʾajmaʿū ʾamrahum wa-hum yamkurūna
These are accounts from the Unseen, which We reveal to you, and you were not with them when they conspired together and schemed.
— Ali Quli Qarai
Surah Yusuf – Verse 102
102. “That is of the news of the Unseen (which) We reveal to you (O’ Prophet); and you were not with them (the brothers of Joseph) when they agreed upon their plan and they were plotting.”
After winding up the story of Yusuf, with all its didactic lessons and precious conclusions and without any extravagant and historical superstition, the Qur’an, addressing the Prophet (S), says that this information was news from the invisible world which Allah had revealed to him, because he was not there to witness the most secret and detailed thoughts and behaviors that they had occurred, such as the secret plotting of the brothers against Yusuf and their attempts to deceive their father.
The verse says:
“That is of the news of the Unseen (which) We reveal to you (O’ Prophet); and you were not with them (the brothers of Joseph) when they agreed upon their plan and they were plotting.”
Therefore, it was only revelation of Allah which informed him of such important news. This statement makes it clear that though the story of Yusuf has been mentioned in the Torah, and naturally the people of Arabia, more or less, knew something about it, but they never knew the whole event properly and in detail, even what was said in private meetings has not been free from additional matters and superstitions.