And when the [contents of] graves are scattered, (82:4)

Almuntakhab Fi Tafsir Alquran Alkarim

And the graves are turned upside down and their contents are discharged and ejected

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(82:4) and when graves are laid open, *2

And when the [contents of] graves are scattered, meaning

*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.
 

And when the [contents of] graves are scattered, meaning in Urdu

اور جب قبریں کھول دی جائیں گی