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.
Genesis 4:8
And Cain talked with Abel his brother: and it came to pass, when they were in the field, that Cain rose up against Abel his brother, and slew him.
Jude's three-way covenant-violation catalog begins with the Genesis 4 Cain-murder as the first constitutional example of violent covenant betrayal. The way of Cain — envious murder of the righteous brother whose offering was accepted — is the prototype of the false teachers' violence against the covenant community they claim to serve. The Genesis 4 Cain-pattern establishes the foundational covenant-betrayal template.
Numbers 16:1-3
Now Korah, the son of Izhar, the son of Kohath, the son of Levi, and Dathan and Abiram, the sons of Eliab, and On, the son of Peleth, sons of Reuben, took men: And they rose up before Moses, with certain of the children of Israel, two hundred and fifty princes of the assembly, famous in the congregation, men of renown: And they gathered themselves together against Moses and against Aaron, and said unto them, Ye take too much upon you, seeing all the congregation is holy, every one of them, and the LORD is among them:
Jude's 'perished in the gainsaying of Core (Korah)' invokes the Numbers 16 Korah-rebellion narrative as the third constitutional covenant-violation type. Korah's gainsaying — challenging the divinely appointed covenant leadership — produced the earth-swallowing judgment that constitutionally established unauthorized rebellion against covenant authority as a capital covenant offense. The Numbers 16 Korah precedent warns against the same presumptuous authority-usurpation that the false teachers practice.