What are the three categories of believers that make up the first resurrection?
The first resurrection comprises three categories: the firstfruits, including Christ and those raised at His resurrection; the main harvest, the church-age believers; and the Old Testament saints, who arise after the kingdom begins and are pictured as wedding guests at the marriage supper of the Lamb.
Les explains that the first resurrection is qualified as the firstfruits—those who came out of the graves on resurrection morning and Christ Himself, the firstfruit—then the main harvest, the church-age believer, and then the Old Testament saints. The Old Testament saints, Daniel’s company, come up sometime after the kingdom has begun and are more or less the wedding guests at the great supper of the marriage supper of the Lamb. Those three categories of believers comprise the first resurrection of believers, as seen in Revelation. The lost are not resurrected until after the kingdom has ended, and the tribulation saints are in a separate resurrection or translation, not a general resurrection.