Al-Isra' - 17:8

عَسَى رَبُّكُمْ أَن يَرْحَمَكُمْ وَإِنْ عُدتُّمْ عُدْنَا وَجَعَلْنَا جَهَنَّمَ لِلْكَافِرِينَ حَصِيرًا
[17:8]
It may be that your Lord will have mercy on you, and if you again return (to disobedience) We too will return (to punishment), and We have made hell a prison for the unbelievers.
It may be that your Lord may (yet) show Mercy unto you; but if ye revert (to your sins), We shall revert (to Our punishments): And we have made Hell a prison for those who reject (all Faith).
It may be that your Lord will have mercy on you, but if ye repeat (the crime) We shall repeat (the punishment), and We have appointed hell a dungeon for the disbelievers.