Andreas of Caesarea — on Rev 20:6 (COMMENTARY ON THE APOCALYPSE 20:5-6)

“[Those who have a portion of the first resurrection] shall serve as priests and shall reign with Christ, as we see, for the thousand years as they are interpreted by us, until Satan is loosed and deceives the nations. Not that these will then be deprived of the kingdom. Rather, they will possess it more certainly and more manifestly with the passing of temporal reality and the arrival of things eternal. For the time between the loosing of the devil and the verdict against him and his punishment in gehenna is short. So, that "they shall be priests of God and of Christ" ought to be regarded as the restoration of former things.… Therefore, since there are two deaths, it is necessary also to accept two resurrections. There is the first, physical death, given as a wage for human disobedience. The second death is eternal punishment. The first resurrection is the giving of life from dead works. The second resurrection is the transformation from the corruption of our bodies into incorruptibility.”