Isaiah 26/1st Book of Enoch

We cross reference to understand the roles of the angels were suppose to play with mankind. The fallen ones come to Enoch the righteous scribe of God to send a petition of forgiveness to God in the watchers and their children ( nephilim). The punishment fit the crime as thus the fallen angels created their own hell by spilling the blood of mankind, so shall a man of flesh and bone declare the judgment of God to them. The fallen angels shall see their children murder each other, and when the consummation comes they will all have their place in the lake of fire. The angels shook, trembled, and cried in hearing Enoch words from God.