A disbeliever in Monotheism (Tawheed) who has not asked for forgiveness, and dies in a state of disbelief, will never be forgiven in the Hereafter
(Indeed, Allah does not forgive associating others with Him ˹in worship˺,1 but forgives anything else of whoever He wills.) An-Nisa 4: 48
(˹It will be said to both angels,˺ “Throw into Hell every stubborn disbeliever, withholder of good, transgressor, and doubter, who set up another god with Allah. So cast them into the severe punishment.”) Qaf 50: 24- 26
الذي يموت و هو كافر و لم يتب إلى الله لن يغفر الله له.
إِنَّ اللَّـهَ لَا يَغْفِرُ أَن يُشْرَكَ بِهِ وَيَغْفِرُ مَا دُونَ ذَٰلِكَ لِمَن يَشَاءُ ۚ) النساء 4: 48)
( أَلْقِيَا فِي جَهَنَّمَ كُلَّ كَفَّارٍ عَنِيدٍ ﴿٢٤﴾ مَّنَّاعٍ لِّلْخَيْرِ مُعْتَدٍ مُّرِيبٍ ﴿٢٥﴾ الَّذِي جَعَلَ مَعَ اللَّـهِ إِلَـٰهًا آخَرَ فَأَلْقِيَاهُ فِي الْعَذَابِ الشَّدِيدِ ﴿٢٦ )
ق 50: 24- 26