Surah 90. Al-Balad, Ayah 20

I.e., the fires of despair in the life to come "rising over the [sinners'] hearts" and "closing in upon them": cf. {104:6-8} and the corresponding note [5]. The phrase rendered by me as "such as have lost themselves in evil" reads, literally, "people of the left side (al-mash'amah)".