Revelation 18:6

“Reward her even as she rewarded you, etc.] This is spoken to the people of God, who are before called out of Babylon; and the chief of them are the seven angels with the seven last plagues of the wrath of God, and the same with the ten kings that will burn the whore with fire; these are called upon to take vengeance, by way of retaliation, for what she had done to them, in allusion to what is said of old Babylon, (<240115>Jeremiah 1:15 51:24,35) and must be understood not of what she will have done to them personally, but to their predecessors in the faith of Christ in former ages; that as she had hated them, and made war with them, so now they should hate her, and make war with her; and as…”

“Addressed to the executioners of God's wrath. Reward--Greek, "repay." she rewarded--English Version reading adds "you" with none of the oldest manuscripts. But A, B, C, Vulgate, Syriac, and Coptic omit it. She had not rewarded or repaid the world power for some injury which the world power had inflicted on her; but she had given the world power that which was its due, namely, spiritual delusions, because it did not like to retain God in its knowledge; the unfaithful Church's principle was, "Populus vult decipi, et decipiatur." "The people like to be deceived, and let them be deceived." double--of sorrow. Contrast with this the double of joy which Jerusalem shall receive for her past…”

“Reward her even as she rewarded you - It is not said to whom this command is addressed, but it would seem to be to those who had been persecuted and wronged. Applied to mystical Babylon - papal Rome - it would seem to be a call on the nations that had been so long under her sway, and among whom, from time to time, so much blood had been shed by her, to arise now in their might, and to inflict deserved vengeance. See the notes on Revelation 17:16-17. And double unto her double according to her works - That is, bring upon her double the amount of calamity which she has brought upon others; take ample vengeance upon her. Compare for similar language, Isaiah 40:2, “She hath received of the…”

“Reward her - This God speaks to the executioners of his vengeance. Even as she hath rewarded - Others; in particular, the saints of God. And give her double - This, according to the Hebrew idiom, implies only a full retaliation. Revelation 18:7”

“18:6 Double her penalty: The severity of some sins required a double recompense (see Exod 22:4, 7, 9; cp. Isa 40:2; Jer 16:18; 17:18).”

“Reward: Rev 13:10, Rev 16:5, Rev 16:6; Exo 21:23-25; Psa 137:8; Jer 50:15, Jer 50:29, Jer 51:24, Jer 51:49; Ti2 4:14 double unto: Isa 40:2, Isa 61:7; Jer 16:18, Jer 17:18; Zac 9:12 the cup: Rev 14:10, Rev 16:19, Rev 17:2, Rev 17:4 Revelation 18:7”