Irenaeus, Against Heresies 5.35
For all these and other words were unquestionably spoken in reference to the resurrection of the just, which takes place after the coming of Antichrist, and the destruction of all nations under his rule; in [the times of] which [resurrection] the righteous shall reign in the earth, waxing stronger by the sight of the Lord: and through Him they shall become accustomed to partake in the glory of God the Father, and shall enjoy in the kingdom intercourse and communion with the holy angels, and union with spiritual beings; and [with respect to] those whom the Lord shall find in the flesh, awaiting Him from heaven, and who have suffered tribulation, as well as escaped the hands of the Wicked one. For it is in reference to them that the prophet says: "And those that are left shall multiply upon the earth"É