2 Peter 2:4–10

⁴When angels sinned, God did not let them go free without punishment. He sent them to hell and put them in caves ⁿ of darkness where they are being held for judgment. ⁵And God punished the world long ago when he brought a flood to the world that was full of people who were against him. But God saved Noah, who preached about being right with God, and seven other people with him. ⁶And God also destroyed the evil cities of Sodom and Gomorrah ⁿ by burning them until they were ashes. He made those cities an example of what will happen to those who are against God. ⁷But he saved Lot from those cities. Lot, a good man, was troubled because of the filthy lives of evil people. ⁸(Lot was a good man, but because he lived with evil people every day, his good heart was hurt by the evil things he saw and heard.) ⁹So the Lord knows how to save those who serve him when troubles come. He will hold evil people and punish them, while waiting for the Judgment Day. ¹⁰That punishment is especially for those who live by doing the evil things their sinful selves want and who hate authority.

These false teachers are bold and do anything they want. They are not afraid to speak against the angels.