The City of God by Augustine

Augustine opens Book 21 of the City of God with quotes from the central New Testament verses that corroborated his late antique view of immediate posthumous judgment. The Bible contains quite a few verses that imagine the gory suffering of various others or outgroups, Moabites, Philistines, Edomites and others in the Old Testament but then non-Christians in the New Testament. As intense as these verses are, they're also diverse and often ambiguous.