False teachers are like autumn trees without fruit (Jude 12)

Jude is a brief letter that warns against false teachers who have turned the Christian message into licentiousness (v. 4). The author recounts how judgment was meted out upon the unbelievers in the wilderness generation and Sodom and Gomorrah. False teachers will go the way of Cain, Balaam, and Korah, but the readers are to pray in the Holy Spirit and keep themselves in the love of God. The author is traditionally associated with Jude, the brother of the Lord (Mark 6:3).

Jude v3 - Contend for truth