﴿ وَمَن لَّمْ يُؤْمِنۢ بِٱللَّهِ وَرَسُولِهِۦ فَإِنَّآ أَعْتَدْنَا لِلْكَٰفِرِينَ سَعِيرًۭا ﴾

“Now as for those who will not believe in God and His Apostle - verily, We have readied a blazing flame for all [such] deniers of the truth!”

Related Considerations Reference in this passage is to those Bedouin tribes who were invited by Allah's Messenger ﷺ to join the party of 1400 Muslims who were marching to Hudaibiyah but on one pretext or another, they requested to be excused. This was narrated in part [ 1] of the story of Hudaibiyah. According to some versions, some of those people later repented and became sincere Muslims.