Translation of the verse 5 from Surah At-Takathur : Number of verses 8 - - page 600 - Part 30.
Nay! If you knew with a sure knowledge (the end result of piling up, you would not have occupied yourselves in worldly things)
No! If you only knew with knowledge of certainty...
(102:5) Nay, would that you knew with certainty of knowledge (what your attitude will lead to, you would never have acted the way you do).
Source : At-Takathur Verse 5: No! If you only knew with knowledge of certainty...