(11) Three examples of similar wickedness: Cain, Balaam, Korah.
Woe unto them! — An echo of Christ’s denunciations in the first three Gospels, whereby the description of these evil-doers takes for the moment a denunciatory form. The past tenses immediately following are owing to the writer’s placing himself in thought at the moment when these men reap the consequences of their sins: their punishment is so certain, that he regards it as having come.
In the way of Cain. — The first great criminal; the first to outrage the laws of nature. Explanations to the effect that these libertines followed Cain by murdering men’s souls by their corrupt doctrine, or by persecuting believers, and other suggestions still more curious, are needlessly far-fetched. John 8:44, and 1 John 3:15, are not strictly apposite: these ungodly men may have hated and persecuted the righteous, but St. Jude does not tell us so. Sensuality is always selfish, but by no means always ill-natured or malignant.
Ran greedily after the error of Balaam for reward. — The Greek for “ran greedily” literally means “they were poured out in streams;” the Greek for “error” may also mean “deception.” Hence three renderings are possible: (1) as the Authorised version; (2) “they ran greedily after the deception of Balaam’s reward;” (3) “they were undone by the deception of Balaam’s reward.” The first is best. “Reward” in the Greek is the genitive of price. Comp. “the rewards of divination” (Numbers 22:7); “they hired against thee Balaam” (Deuteronomy 23:4; Nehemiah 13:2). Here, again, far-fetched explanations may be avoided. The allusion lies on the surface — running counter to God’s will from interested motives. Possibly, there may also be some allusion to Balaam’s causing the Israelites to be seduced into licentiousness (Revelation 2:14).
Perished in the gainsaying of Core — i.e., through gainsaying like that of Korah; referring to his speaking against Moses in the revolutionary opposition which he headed. These libertines, like Korah; treated sacred ordinances with contempt.
The triplet in this verse, like that in Jude 1:8, is parallel to the three examples of God’s vengeance, Jude 1:5-7. Cain, like the inhabitants of Sodom and Gomorrha, outraged the laws of nature; Balaam, like the impure angels, despised the sovereignty of God; Korah, like those who disbelieved the report of the spies, spoke evil of dignities.