People ask you about the Last Hour; you say: The Knowledge about It is with Allah; and what do you know? That Last Hour may happen near.
During the period of Messenger Muhammed Lord’s Book Adhikr was not codified. So it is told in the verse as ‘What you know? That Last Hour may happen near’. Today since Adhikr explains everything as told in verse 16: 89, and the Best Interpretation of the Lord’s Book as told in verse 25: 33 is codified as a Book, any matter including the Last Hour should be understood from Adhikr. Through verses 16: 43 and 21: 7 it is commanded to ask about anything one doesn’t know to one who knows Adhikr. The Prophet is commanded to ask about the Impartial Lord to the Three Time Knower mentioned in verse 25: 59. See explanation 2: 255.