Albert Barnes' Notes on the Whole Bible - Revelation 18:6
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... read more
The Pulpit Commentary - Revelation 18:7
The rule of retribution "How much … so much," etc. The subject here suggested is man's future retribution ruled by his present condition. "How much she hath glorified herself, and lived deliciously, so much... sorrow give her." This, stripped of all historical and metaphorical allusions, means the present circumstances of the sinner shall rule his future suffering. I offer three remarks on this subject. I. THIS RULE COMMENDS ITSELF TO OUR SENSE OF JUSTICE . That... read more