Quran 22:21 — Pilgrimage (Al-Hajj)

وَلَهُم مَقٰمِعُ مِن حَديدٍ

They will be confined in iron pots.

[22:20] It will cause their insides to melt, as well as their skins.

[22:22] Whenever they try to exit such misery, they will be forced back in: "Taste the agony of burning."