كَلَّا سَوْفَ تَعْلَمُونَ
Kall a sawfa taAAlamoon a Nay, in time you will come to understand!
 - Mohammad Asad
Nevertheless, soon you shall come to know.
 - Muhammad Farooq-i-Azam Malik
But no! You will soon come to know.
 - Mustafa Khattab
Nay, but ye will come to know!
 - Marmaduke Pickthall
But nay ye soon shall know (the reality).
 - Abdullah Yusuf Ali