كَلَّا سَيَعْلَمُوْنَۙ ( النبإ: ٤ )
kallā
كَلَّا
Nay!
sayaʿlamūna
سَيَعْلَمُونَ
Soon they will know
Kallaa sa y'alamoon (an-Nabaʾ 78:4)
Sahih International:
No! They are going to know. (An-Naba [78] : 4)
1 Mufti Taqi Usmani
Indeed they will soon know.