Translation of the verse 4 from Surah Al-InfiTar : Number of verses 19 - - page 587 - Part 30.
And when the graves are turned upside down (and they bring out their contents)
And when the [contents of] graves are scattered,
(82:4) and when graves are laid open, *2
*2) In the first three verses, the first stage of the Resurrection has been mentioned, and in this verse the second stage is being described. "Opening of the graves" implies resurrection of the dead then.
Source : Al-InfiTar Verse 4: And when the [contents of] graves are scattered,