The word “you” is plural, referring to the saints, the apostles and the prophets. As they had been victims of the prostitute’s attacks (Revelation 12:17; Revelation 13:7; see further Revelation 2:10, Revelation 2:13; Revelation 6:9), the Lord had turned her hatred against them back onto her own head (Revelation 18:6). So the impatient lament of the souls under the altar (Revelation 6:9) receives an appropriate and just response.
20 Rejoice over her, O heaven, and you saints and apostles and prophets, for God has given judgment for you against her!”