When will the resurrection of the just occur?
The resurrection of the just will occur before the Kingdom begins, separated from the resurrection of the unjust by a thousand years. The unjust are raised after the thousand years are finished at the Great White Throne, where death and hell are cast into the lake of fire, the second death.
Les explains that the two resurrections are separated by a thousand years. The resurrection of the just, as Jesus referred to it in John's Gospel chapter 5, will all be resurrected before the Kingdom begins. The resurrection of the unjust, as He spoke of it in John, will take place after the thousand years are finished. At that point, death and hell are cast into the lake of fire, the second death. The lost have died physically but now experience spiritual lostness, separation from God. So the saved are resurrected before the Kingdom begins, while the lost of all the ages are resurrected at the Great White Throne and then go to their eternal doom. Unbelievers will have a body fit for the lake of fire, even as believers have a body prepared for eternal bliss.