Translation of the verse 5 from Surah An-Naba’ : Number of verses 40 - - page 582 - Part 30.
Nay, again, they will come to know!
Then, no! They are going to know.
(78:5) again, no indeed; soon will they come to know.
*3) That is, the time is not far off when the same thing about which they are expressing all sorts of meaningless doubts and misgivings, will appear before them as a reality. Then they will realize that what the Messenger had foretold was absolutely true and what they were saying on the basis of conjecture and speculation had no truth in it.
Source : An-Naba’ Verse 5: Then, no! They are going to know.