Surah Al-Haqqah — Ayah 16 (69:16)

English translation (Saheeh International)

And the heaven will split [open], for that Day it is infirm.¹

1. - i.e., weak, enfeebled and unstable.

Brief commentary

And the sky will crack open on that day because of the angels descending from it. So on that day it will be weak, whereas it was once solid and unyielding.