Revelation 21:3

out of heaven--so ANDREAS. But A and Vulgate read, "out of the throne." the tabernacle--alluding to the tabernacle of God in the wilderness (wherein many signs of His presence were given): of which this is the antitype, having previously been in heaven: Rev 11:19; Rev 15:5, "the temple of the tabernacle of the testimony in heaven"; also Rev 13:6. Compare the contrast in Heb 9:23, Heb 9:14, between "the patterns" and "the heavenly things themselves," between "the figures" and "the true." The earnest of the true and heavenly tabernacle was afforded in the Jerusalem temple described in Eze. 40:1-42:20, as about to be, namely, during the millennium. dwell with them--literally, "tabernacle with them"; the same Greek word as is used of the divine Son "tabernacling among us." Then He was in the weakness of the flesh: but at the new creation of heaven and earth He shall tabernacle among us in the glory of His manifested Godhead (Rev 22:4). they--in Greek emphatic, "they" (in particular). his people--Greek, "His peoples": "the nations of the saved" being all peculiarly His, as Israel was designed to be. So A reads. But B, Vulgate, Syriac, and Coptic read, "His people": singular. God himself . . . with them--realizing fully His name Immanuel.

— Jamieson-Fausset-Brown Commentary (public domain)