Jude 8-10 & 2 Pet 2:10-11
Jude 1:8 (NIV) In the very same way, these dreamers pollute their own bodies, reject authority and slander celestial beings.
9 But even the archangel Michael, when he was disputing with the devil about the body of Moses, did not dare to bring a slanderous accusation against him, but said, "The Lord rebuke you!"
10 Yet these men speak abusively against whatever they do not understand; and what things they do understand by instinct, like unreasoning animals--these are the very things that destroy them.
2Pet 2:10 (NIV) This is especially true of those who follow the corrupt desire of the sinful nature {[10] Or the flesh}and despise authority.
Bold and arrogant, these men are not afraid to slander celestial beings;
11 yet even angels, although they are stronger and more powerful, do not bring slanderous accusations against such beings in the presence of the Lord.