Jude 1:10 in the King James Version
But these speak evil of those things which they know not: but what they know naturally, as brute beasts, in those things they corrupt themselves.
Context
9 But Michael, the archangel, when contending with the devil and arguing about the body of Moses, dared not bring against him an abusive condemnation, but said, “May the Lord rebuke you!”
10 But these speak evil of whatever things they don’t know. They are destroyed in these things that they understand naturally, like the creatures without reason.
11 Woe to them! For they went in the way of Cain, and ran riotously in the error of Balaam for hire, and perished in Korah’s rebellion.