Woe unto them! for they have gone in the way of Cain, and ran greedily after the error of Balaam for reward, and perished in the gainsaying of Core.
Woe. Note, 2 Peter 2:14, "cursed children."
Cain - the murderer: the root of whose sin was hatred and envy of the godly; the sin of these seducers.
Ran greedily, х exechutheesan (G1632)] - 'have been poured forth' like a torrent bursting its banks. Reckless of the cost, the loss of God's favour and heaven, on they rush after gain like Balaam. Perished in the gainsaying of Core - (note, Jude 1:12.) In reading of Korah perishing by gainsaying, we read also of these perishing through the same: for the same seed bears the same harvest.