Revelation 12
And there appeared a great wonder in heaven; a woman clothed with the sun, and the moon under her feet, and upon her head a crown of twelve stars: (Rev. 12:1 KJV)
And she being with child cried, travailing in birth, and pained to be delivered. (Rev. 12:2 KJV)
And there appeared another wonder in heaven; and behold a great red dragon, having seven heads and ten horns, and seven crowns upon his heads. (Rev. 12:3 KJV)
And his tail drew the third part of the stars of heaven, and did cast them to the earth: and the dragon stood before the woman which was ready to be delivered, for to devour her child as soon as it was born. (Rev. 12:4 KJV)
And she brought forth a man child, who was to rule all nations with a rod of iron: and her child was caught up unto God, and to his throne. (Rev. 12:5 KJV)
And the woman fled into the wilderness, where she hath a place prepared of God, that they should feed her there a thousand two hundred and threescore days. (Rev. 12:6 KJV)
And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels, (Rev. 12:7 KJV)
And prevailed not; neither was their place found any more in heaven. (Rev. 12:8 KJV)
And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him. (Rev. 12:9 KJV)
And I heard a loud voice saying in heaven, Now is come salvation, and strength, and the kingdom of our God, and the power of his Christ: for the accuser of our brethren is cast down, which accused them before our God day and night. (Rev. 12:10 KJV)
And they overcame him by the blood of the Lamb, and by the word of their testimony; and they loved not their lives unto the death. (Rev. 12:11 KJV)
Therefore rejoice, ye heavens, and ye that dwell in them. Woe to the inhabiters of the earth and of the sea! for the devil is come down unto you, having great wrath, because he knoweth that he hath but a short time. (Rev. 12:12 KJV)
And when the dragon saw that he was cast unto the earth, he persecuted the woman which brought forth the man child. (Rev. 12:13 KJV)
And to the woman were given two wings of a great eagle, that she might fly into the wilderness, into her place, where she is nourished for a time, and times, and half a time, from the face of the serpent. (Rev. 12:14 KJV)
And the serpent cast out of his mouth water as a flood after the woman, that he might cause her to be carried away of the flood. (Rev. 12:15 KJV)
And the earth helped the woman, and the earth opened her mouth, and swallowed up the flood which the dragon cast out of his mouth. (Rev. 12:16 KJV)
And the dragon was wroth with the woman, and went to make war with the remnant of her seed, which keep the commandments of God, and have the testimony of Jesus Christ. (Rev. 12:17 KJV)
Fallen Angels:
In Gen3:14 the LORD God (Yahweh) cursed the serpent to spend its life on the ground (perhaps his wings were taken)
That old serpent (called Satan) was cast out of heaven into the earth with one-third of the angels. (Rev 12:9, 12:4)
And the angels who did not keep their positions of authority but abandoned their proper dwelling (Jude1:6, 2 Peter)
Jesus says: I saw Satan fall like lighning from heaven. (Luke 10:18)
The first instance in the Hebrew Bible where the word śāṭān is applied to a supernatural being occurs in the Book of Numbers: “Elohim [i.e., God]’s anger was kindled because he [i.e., Balaam] was going, and the angel of Yahweh took his stand in the road as his adversary [i.e., his śāṭān].” (NRSV 22:22)
In the Book of Job and the Book of Zechariah the word the satan clearly describes a specific supernatural entity, an angel who works for Yahweh.
In 1 Enoch 10 and 18, it is described that certain fallen angels (the “Watchers” or “Grigori”) are punished. These angels had taught humans how to wage war and use magic, and they had fathered children with human women.
Uriel is explicitly named as the one who brings the fallen angels to the prison or watches over them. This prison is described as a place where they are held until God’s judgment, before they are finally punished. Uriel is one of the four (or seven, depending on the text version) archangels mentioned as guardians of specific heavenly realms or tasks. In 1 Enoch, he is often described as an angel who proclaims “the light of God” or carries out divine punishments.
In short:
According to the Book of Enoch, the prison guarded by Uriel is for the fallen angels (watchers) who rebelled against God and led humanity into sin.The entrance to the approximately 800 meter deep abyss is located about 17 Miles (27 km) from the Black See near Lake Monoun called Bab edh-Dhra.