That is from the news of the unseen which We reveal unto you, and you were not there with them while they all gathered for their plotting.
This verse reminds Messenger and believers that Adhikr is the Speech of the Three-Time-Knower Lord. It is told in verse 35: 14: "None except a Three-Time-Knower could inform you about news like this”. But the Arabic Quran reading Fujjar have made their food 'rejecting Adhikr'. They will always argue that indeed Adhikr is nothing except the tales of ancestors as explained in verses 6: 25-26. Without transforming the Jinn soulmate into a believer with Adhikr, nobody can become a believer and can enter Paradise as explained in verse 6: 112. These wrongdoing people are carrying Lord’s Book as a burden carrying donkeys. They will wail on the Day of Judgment as: “Woe to me! If I hadn’t selected so and so as my intimate friend! He strayed me from Adhikr after It had come to me, and Satan was a traitor to mankind” as told in verse 25: 27-29. See explanation 2: 165-167; 11: 100, 118-119 and 14: 46.