Revenge
'To be avenged seventy and seven fold' denotes damnation.
In Genesis 4:15, vengeance signifies a sacrilege, and condemnation for it. (Arcana Coelestia 392)
In Deuteronomy 32:35, this signifies the genuine truth that the Lord is love and mercy itself. (Doctrine Regarding Sacred Scripture 94)
In Psalm 94:1, this signifies judgment on the Jews because they had destroyed the church. (The Inner Meaning of the Prophets and Psalms 344)
In Psalm 99:8, this signifies that the Lord is the Redeemer although it appears that He punishes. (The Inner Meaning of the Prophets and Psalms 349; Doctrine Regarding Sacred Scripture 94)
In Isaiah 59:17, this signifies the truths by which the Lord fought with the hells. (Apocalypse Explained 395[13])
In Isaiah 34:8, this signifies the Last Judgment and the condemnation of people who, by falsities and evils, have destroyed the truths of the church. (Apocalypse Explained 850[16])
(Referenser: Arcana Coelestia 432-444, Genesis 4:24)
The Inner Meaning of the Prophets and Psalms #344
344. Internal Meaning of Psalm 94
Of the Jewish nation: it destroyed the church.
1-2 O that judgment may be executed upon them! (15)
3-11 Because that nation has destroyed the church, neither does it fear God, although He sees all things. (3)
12-15 For the sake of the church the Lord will come to judge. (11, 15)
16-19 The Divine of the Lord gives help against the evil and in temptation. (6, 9)
20-21 The evil rise up and wish to kill, (6, 9)
22-23 but through help from His Divine they will perish. (4, 8)