Translation of the verse 19 from Surah An-Naba’ : Number of verses 40 - - page 582 - Part 30.
And the heaven shall be opened, and it will become as gates,
And the heaven is opened and will become gateways
(78:19) and when the sky shall be opened up and will become all doors;
*12) This implies the final sounding of the Trumpet at which all dead men will rise back to life forthwith. "You" implies not only those who were the addressees at that time but all those humans who will have been born from the beginning of creation till Resurrection. (For explanation, see E.N. 57 of Ibrahim, E.N. 1 of AlHajj, E.N.'s 46, 47 of Ya Sin, E.N. 79 of Az-Zumar).
Source : An-Naba’ Verse 19: And the heaven is opened and will become gateways