The heavens itself will be rent asunder (on that day). His promise is bound to be fulfilled.
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Tafseer
'Abdullāh Ibn 'Abbās / Muḥammad al-Fīrūzabādī
تفسير : (the very heaven being then) when the children turn grey; and it is said: due to the descent of the command of the lord and the angels (rent asunder. his promise) regarding the resurrection (is to be fulfilled) is to take place.
Jalāl al-Dīn al-Maḥallī
تفسير : with the heaven being rent asunder thereon, on that day, because of its severity. his promise, exalted be he, of the coming of that [day], shall be fulfilled, that is to say, it will come to pass without doubt.
