Al-Mukhtasar

بِسْمِ ٱللَّهِ ٱلرَّحْمَـٰنِ ٱلرَّحِيمِ إِذَا ٱلسَّمَآءُ ٱنفَطَرَتْ ﴿١﴾

When the sky will split apart because of the angels descending from it.