“Come out of her, my people” is a call to separate from the condemned city-system — Jerusalem in prophetic dress — before her judgment falls.
Revelation’s Babylon is the great city responsible for the blood of the saints and prophets (Revelation 17–18). She sits on many waters, trades in luxury, and falls in an hour. The cry goes out: “Come out of her, my people, lest you take part in her sins and share in her plagues” (Revelation 18:4).
In the prophetic lexicon, “Babylon” can name the oppressor city that destroys and is destroyed. For a first-century audience shaped by the prophets and by Jesus’ warnings against Jerusalem, the primary identification is not a pagan capital alone but the covenant city that had become the persecutor of the prophets and of the Lamb’s witnesses — “where their Lord was crucified” (Revelation 11:8).
Luke 21:20–22: when armies surround Jerusalem, flee to the mountains; these are days of vengeance to fulfill all that is written. The call to exit is practical and spiritual. Remaining identified with the condemned order is deadly.
Revelation’s “come out” continues that urgency. It is not a modern slogan for leaving culture in general. It is covenant separation from a city under sentence.
Exit the doomed house; do not share her plagues.
Flight is faithfulness when judgment is at the door.
When Babylon falls, heaven rejoices because God has vindicated the blood of His servants (Revelation 19:1–2). The merchants weep; the saints are told to rejoice. That pattern matches the end of the persecuting center and the relief of the churches who endured her pressure.
Coming out of Babylon is completed as a historical command for that generation; its moral residue remains: do not rebuild identity on a judged system. The people of God are defined by the Lamb, not by the city that rejected Him.