Surah Al-Haqqah 69:16

وَٱنشَقَّتِ ٱلسَّمَآءُ فَهِىَ يَوْمَئِذٍ وَاهِيَةٌ

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

Translation: Saheeh International

Tafsir

and the heaven will be rent asunder — for it will be very frail on that day —

Excerpt from Tafsir al-Jalalayn, commentary on 69:16, via Quran.com. The reader has the full commentary and 9 more tafsirs.