Sura 78 An-Naba' (The Announcement), ayah 4

1. كَلَّا سَيَعْلَمُونَ

   Translation by words

   كَلَّا

   Nay!

   سَيَعْلَمُونَ

   (soon) they will know.

   No! They are going to know.

   78:4

Translation: Saheeh International