Pelagius I, Letter Humani generis to King Childebert 1, February 3, 557 on the "vessels of wrath" (Romans 9:22) remaining such "by their own choice")

 . . . the wicked, however, remaining by their own choice (arbitrio voluntatis) as “vessels of wrath fit for destruction” [Rom 9:22], who either did not know the way of the Lord or, knowing it, abandoned it when seduced by various transgressions, he will hand over by a most just judgment to the punishment of the eternal and inextinguishable fire, so that they may burn without end.

 

Heinrich Denzinger, Compendium of Creeds, Definitions, and Declarations on Matters of Faith and Morals, ed. Peter Hünermann, Robert Fastiggi, and Anne Englund Nash (43^rd ed; San Francisco: Ignatius Press, 2012), 155