And the heaven will split [open], for that Day it is infirm. (69:16)

﴿وَانشَقَّتِ السَّمَاءُ فَهِيَ يَوْمَئِذٍ وَاهِيَةٌ﴾
[ الحاقة: 16]

69:16 And the heaven will split [open], for that Day it is infirm.

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.

And the heaven will split asunder, for that Day it (the heaven will be frail (weak), and torn up,

phonetic Transliteration

Wainshaqqati alssamao fahiya yawmaithin wahiyatun

Abdullah Yusuf Ali - Translation

And the sky will be rent asunder, for it will that Day be flimsy,

Safi-ur-Rahman al-Mubarakpuri

And the heaven will be rent asunder, for that Day it will be frail and torn up.

Page 567 English transliteration