COMMENTARY on 79:13
A. Yusuf Ali:

Translation:
But verily, it will be but a single (Compelling) Cry, 5925
Commentary:

5925  Judgement will be inaugurated with a single compelling Cry. Cf. 37:19. See also 36:29 and 49, where the single mighty Blast seems to refer to the sinners being cut off in this life and plunged into the other world where they will be further judged, and 36:53, where the final Judgement is referred to.