78:4
كَلَّا سَيَعْلَمُونَ
Transliteration:
Kalla sayaAAlamoona
Word by Word:
Nay! (soon) they will know.
Translations:
Nay, but in time they will come to understand [it]!
Verily, they shall soon (come to) know!
Nay, but they will come to know!
Nay, they will soon know;
No! They are going to know.