Surah Al-Layl 92:16
ٱلَّذِى كَذَّبَ وَتَوَلَّىٰ
Who had denied and turned away.
Translation: Saheeh International
Tafsir
he who denies the Prophet and turns away from faith — this delimiting of those who deserve to enter this fire constitutes an interpretation of His saying But He forgives other than that to whomever He will Q. 448 which in turn suggests that what is meant is that entry into the Fire which will be everlasting.
Excerpt from Tafsir al-Jalalayn, commentary on 92:16, via Quran.com. The reader has the full commentary and 9 more tafsirs.