The sky will be split on account of its grief. The promise of Allah shall be fulfilled.
The heaven will shatter therefrom. His promise is true.
on which the heaven will split apart, and His promise is done
The heaven being rent asunder thereby. His promise is ever fulfilled
The sky/space is split/cleaved with (by) it, His promise was/is made/done
The day on which the sky will open up into pieces; God’s promises will surely be fulfilled
The heaven will split asunder with its grief; the promise of Allah will surely occur
The day when the heaven will be rent asunder; and HIS promise is bound to be fulfilled
(The Day) by whose severity the heaven will be split apart? His promise is bound to be fulfilled
And because of which the heaven shall be rent asunder. (This is the promise of God,) remember His promise is bound to be fulfilled
Whereon the heaven will be cleft asunder? His Promise is certainly to be accomplished