Surah 36. Yasin, Ayah 63

The phrase "This, then, is the hell" points to the fact that the sinners' realization of their having gone astray despite repeated warnings by the prophets will, in itself, be a source of intense suffering ('adhab) in the life to come. The element of repetition or persistence is implied in the use of the auxiliary verb kuntum both here and in the next verse.

Fifthly, the naked fact is now placed before them,-the Hell,-the state of damnation, which they could so easily have avoided!