How were the fallen angels punished?

The fallen angels were punished by being bound in the valleys and dark chasms of the earth, held there until the great day of judgment when they would be cast into the fiery abyss. This sentence of prolonged restraint followed by final reckoning forms the core of the prophecy concerning their fate after they abandoned their heavenly station.

According to the Enochian tradition, the chief offenders among the Watchers face imprisonment in these earthly depths as both retribution for their corruption of humanity and a safeguard against further interference. The account in 1 Enoch 10 and 21 describes this binding until the day they are thrown into eternal fire, while Jubilees 5 reinforces their confinement in the depths of the earth (Prophecies - Prophecies: Fall and Judgment of the Watchers).

Their giant offspring, the Nephilim, were consigned to mutual destruction, completing the judgment that also prepared the way for the Flood as a broader response to the cosmic disorder they had unleashed (Timeline - Timeline: Fall of the Watchers). This framework underscores the certainty of accountability for the rebellious angels who swore their oath on Mount Hermon and shared forbidden knowledge.