Al-Mukhtasar

بِسْمِ ٱللَّهِ ٱلرَّحْمَـٰنِ ٱلرَّحِيمِ إِذَا ٱلسَّمَآءُ ٱنشَقَّتْ ﴿١﴾

When the sky ruptures because of the angels descending from it.