Holy Quran » AN NABA' : 19

78 : 19

وَفُتِحَتِ السَّمَاء فَكَانَتْ أَبْوَابًا

And the heaven is opened and will become gateways

Tafseer

{ وفُتِّحت السماء } بالتشديد والتخفيف شققت لنزول الملائكة { فكانت أبوابا } ذات أبواب.

{And the heaven was opened} with emphasis and without emphasis, it was split for the angels to descend, {and it became doors} with doors.