Cassiodorus, on Rev 6:10

“And they cried with a loud voice, saying: How long, O Lord (holy and true) dost thou not judge and revenge our blood on them that dwell on the earth?”

“[The psalmist begs] that the Lord avenge the blood of the faithful, who endured martyrdom for his name. Vengeance is the means by which force and injustice are repelled by just retribution. But there the prayer seems to be directed toward the conversion of the enemy. For when temporal vengeance is exacted from them in this world, they escape the destruction of eternal damnation; it is in this sense that we read in Revelation that the souls of martyrs under God's altar demand to be avenged by divine decree. This vengeance is to be interpreted as we have defined it, for saintly people do not seek a cruel vengeance since they accept the precept "Pray for your enemies, do good to those that hate you," and the like. Finally the Lord himself, who executes most powerfully his own commands, spoke these words on the cross: "Father, forgive them, for they know not what they do."”

Imported from an open dataset — not yet checked against the printed edition.