Woe to them! For they walk in the way of Cain, and abandon themselves for the sake of gain to Balaam’s error, and perish in Korah’s rebellion.
οὐαὶ αὐτοῖς, ὅτι τῇ ὁδῷ τοῦ Κάϊν ἐπορεύθησαν καὶ τῇ πλάνῃ τοῦ Βαλαὰμ μισθοῦ ἐξεχύθησαν καὶ τῇ ἀντιλογίᾳ τοῦ Κόρε ἀπώλοντο.
Haydock Catholic Bible Commentary: Jude
They have imitated, or gone in the way of Cain, who murdered his brother; and they have a mortal hatred against the faithful. They have imitated Balaam and his covetousness, (see 2 Peter ii. 15.) and Core, (Num. xvi.) who with others opposed Moses; and as these sinners perished, so will they. Wi. — Way, &c. Heretics follow the way of Cain, by murdering the souls of their brethren; the way of Balaam by putting a scandal before the people of God, for their own private ends; and the way of Core or Korah, by their opposition to the church governors of divine appointment. Ch.