Jude 1:6-7

And remember the angels who lost their authority to rule. They left their proper home. So the Lord has kept them in darkness, bound with everlasting chains, to be judged on the great day. Also, remember the cities of Sodom and Gomorrah and the other towns around them. Like those angels they were full of sexual sin and involved themselves in sexual relations that are wrong. And they suffer the punishment of eternal fire, an example for us to see.