Surah Al-Isra, Verse 8

عَسَىٰ رَبُّكُمۡ أَن يَرۡحَمَكُمۡۚ وَإِنۡ عُدتُّمۡ عُدۡنَاۚ وَجَعَلۡنَا جَهَنَّمَ لِلۡكَٰفِرِينَ حَصِيرًا٨

ʿasā rabbukum an yarḥamakum wa-in ʿudttum ʿud'nā wajaʿalnā jahannama lil'kāfirīna ḥaṣīran

[Then Allāh said], "It is expected, [if you repent], that your Lord will have mercy upon you. But if you return [to sin], We will return [to punishment]. And We have made Hell, for the disbelievers, a prison-bed."