﴿ كَلَّا لَئِن لَّمْ يَنتَهِ لَنَسْفَعًۢا بِٱلنَّاصِيَةِ ﴾

“Nay, if he desist not, We shall most surely drag him down upon his forehead”

No indeed! — a repudiation of him — Assuredly if la-in the lām is for oaths he does not desist from the disbelief that he is upon We shall seize him by the forelock We shall drag him to the Fire by his forelock