Surah Al-Infitar 82:1
إِذَا ٱلسَّمَآءُ ٱنفَطَرَتْ
When the sky breaks apart
Translation: Saheeh International
Tafsir
When the heaven is split open when it is rent asunder
Excerpt from Tafsir al-Jalalayn, commentary on 82:1, via Quran.com. The reader has the full commentary and 9 more tafsirs.