ذَٰلِكَ مِنۡ أَنۢبَآءِ ٱلۡغَيۡبِ نُوحِيهِ إِلَيۡكَۖ وَمَا كُنتَ لَدَيۡهِمۡ إِذۡ أَجۡمَعُوٓاْ أَمۡرَهُمۡ وَهُمۡ يَمۡكُرُونَ ١٠٢
That is from the news of the unseen which We reveal, [O Muḥammad], to you. And you were not with them when they put together their plan while they conspired.
Translation: Saheeh International (English)
Each word's meaning and sound
Allah revealed all that has been mentioned from the story of Joseph and his brothers to the Messenger (peace be upon him). He had no knowledge of it beforehand, since he was not there with the brothers of Joseph when they agreed to throw him into the bottom of a well, and when they planned their trick; but Allah revealed this all to the Messenger (peace be upon him).
Al-Mukhtasar in interpreting the Noble Quran