These verses of the Book of Enoch fits like a glove when comparing verses in "Jude", "2 Peter: Chapter 2", & "Genesis 6 - 7". Also it was so brilliant and necessary as to why the Lord our God sent the Flood & where evil spirits come from.
The Book of Enoch
Chapter 7
1. It happened after the sons of men had multiplied in those days, that daughters were born to them, elegant and beautiful.
2. And when the angels, the sons of heaven, beheld them, they became enamoured of them, saying to each other, Come, let us select for ourselves wives from the progeny of men, and let us beget children.
3. Then their leader Samyaza said to them; I fear that you may perhaps be indisposed to the performance of this enterprise;
4. And that I alone shall suffer for so grievous a crime.
5. But they answered him and said; We all swear;
6. And bind ourselves by mutual execrations, that we will not change our intention, but execute our projected undertaking.
7. Then they swore all together, and all bound themselves by mutual execrations. Their whole number was two hundred, who descended upon Ardis, which is the top of mount Armon.
8. That mountain therefore was called Armon, because they had sworn upon it, (5) and bound themselves by mutual execrations.
9. These are the names of their chiefs: Samyaza, who was their leader, Urakabarameel, Akibeel, Tamiel, Ramuel, Danel, Azkeel, Saraknyal, Asael, Armers, Batraal, Anane, Zavebe, Samsaveel, Ertael, Turel, Yomyael, Arazyal. These were the prefects of the two hundred angels, and the remainder were all with them.
10. Then they took wives, each choosing for himself; whom they began to approach, and with whom they cohabited; teaching them sorcery, incantations, and the dividing of roots and trees.
11. And the women conceiving brought forth giants,
12. Whose stature was each three hundred cubits. These devoured all which the labor of men produced; until it became impossible to feed them;
13. When they turned themselves against men, in order to devour them;
14. And began to injure birds, beasts, reptiles, and fishes, to eat their flesh one after another, and to drink their blood.
15. Then the earth reproved the unrighteous.
Chapter 8
1. Moreover Azazyel taught men to make swords, knives, shields, breastplates, the fabrication of mirrors, and the workmanship of bracelets and ornaments, the use of paint, the beautifying of the eyebrows, the use of stones of every valuable and select kind, and all sorts of dyes, so that the world became altered.
2. Impiety increased; fornication multiplied; and they transgressed and corrupted all their ways.
3. Amazarak taught all the sorcerers, and dividers of roots:
4. Armers taught the solution of sorcery;
5. Barkayal taught the observers of the stars,
6. Akibeel taught signs;
7. Tamiel taught astronomy;
8. And Asaradel taught the motion of the moon,
9. And men, being destroyed, cried out; and their voice reached to heaven.
Chapter 15
1. Then addressing me, He spoke and said, Hear, neither be afraid, O righteous Enoch, you scribe of righteousness: approach hither, and hear my voice. Go, say to the Watchers of heaven, who have sent you to pray for them, You ought to pray for men, and not men for you.
2. Wherefore have you forsaken the lofty and holy heaven, which endures for ever, and have lain with women; have defile yourselves with the daughters of men; have taken to yourselves wives; have acted like the sons of the earth, and have begotten an impious offspring?
3. You being spiritual, holy, and possessing a life which is eternal, have polluted yourselves with women; have begotten in carnal blood; have lusted in the blood of men; and have done as those who are flesh and blood do.
4. These however die and perish.
5. Therefore have I given to them wives, that they might cohabit with them; that sons might be born of them; and that this might be transacted upon earth.
6. But you from the beginning were made spiritual, possessing a life which is eternal, and not subject to death for ever.
7. Therefore I made not wives for you, because, being spiritual, your dwelling is in heaven.
8. Now the giants, who have been born of spirit and of flesh, shall be called upon earth evil spirits, and on earth shall be their habitation. Evil spirits shall proceed from their flesh, because they were created from above; from the holy Watchers was their beginning and primary foundation. Evil spirits shall they be upon earth, and the spirits of the wicked shall they be called. The habitation of the spirits of heaven shall be in heaven; but upon earth shall be the habitation of terrestrial spirits, who are born on earth.
9. The spirits of the giants shall be like clouds, which shall oppress, corrupt, fall, content, and bruise upon earth.
10. They shall cause lamentation. No food shall they eat; and they shall be thirsty; they shall be concealed, and shall not rise up against the sons of men, and against women; for they come forth during the days of slaughter and destruction.
The Book of Enoch
Chapter 7
1. It happened after the sons of men had multiplied in those days, that daughters were born to them, elegant and beautiful.
2. And when the angels, the sons of heaven, beheld them, they became enamoured of them, saying to each other, Come, let us select for ourselves wives from the progeny of men, and let us beget children.
3. Then their leader Samyaza said to them; I fear that you may perhaps be indisposed to the performance of this enterprise;
4. And that I alone shall suffer for so grievous a crime.
5. But they answered him and said; We all swear;
6. And bind ourselves by mutual execrations, that we will not change our intention, but execute our projected undertaking.
7. Then they swore all together, and all bound themselves by mutual execrations. Their whole number was two hundred, who descended upon Ardis, which is the top of mount Armon.
8. That mountain therefore was called Armon, because they had sworn upon it, (5) and bound themselves by mutual execrations.
9. These are the names of their chiefs: Samyaza, who was their leader, Urakabarameel, Akibeel, Tamiel, Ramuel, Danel, Azkeel, Saraknyal, Asael, Armers, Batraal, Anane, Zavebe, Samsaveel, Ertael, Turel, Yomyael, Arazyal. These were the prefects of the two hundred angels, and the remainder were all with them.
10. Then they took wives, each choosing for himself; whom they began to approach, and with whom they cohabited; teaching them sorcery, incantations, and the dividing of roots and trees.
11. And the women conceiving brought forth giants,
12. Whose stature was each three hundred cubits. These devoured all which the labor of men produced; until it became impossible to feed them;
13. When they turned themselves against men, in order to devour them;
14. And began to injure birds, beasts, reptiles, and fishes, to eat their flesh one after another, and to drink their blood.
15. Then the earth reproved the unrighteous.
Chapter 8
1. Moreover Azazyel taught men to make swords, knives, shields, breastplates, the fabrication of mirrors, and the workmanship of bracelets and ornaments, the use of paint, the beautifying of the eyebrows, the use of stones of every valuable and select kind, and all sorts of dyes, so that the world became altered.
2. Impiety increased; fornication multiplied; and they transgressed and corrupted all their ways.
3. Amazarak taught all the sorcerers, and dividers of roots:
4. Armers taught the solution of sorcery;
5. Barkayal taught the observers of the stars,
6. Akibeel taught signs;
7. Tamiel taught astronomy;
8. And Asaradel taught the motion of the moon,
9. And men, being destroyed, cried out; and their voice reached to heaven.
Chapter 15
1. Then addressing me, He spoke and said, Hear, neither be afraid, O righteous Enoch, you scribe of righteousness: approach hither, and hear my voice. Go, say to the Watchers of heaven, who have sent you to pray for them, You ought to pray for men, and not men for you.
2. Wherefore have you forsaken the lofty and holy heaven, which endures for ever, and have lain with women; have defile yourselves with the daughters of men; have taken to yourselves wives; have acted like the sons of the earth, and have begotten an impious offspring?
3. You being spiritual, holy, and possessing a life which is eternal, have polluted yourselves with women; have begotten in carnal blood; have lusted in the blood of men; and have done as those who are flesh and blood do.
4. These however die and perish.
5. Therefore have I given to them wives, that they might cohabit with them; that sons might be born of them; and that this might be transacted upon earth.
6. But you from the beginning were made spiritual, possessing a life which is eternal, and not subject to death for ever.
7. Therefore I made not wives for you, because, being spiritual, your dwelling is in heaven.
8. Now the giants, who have been born of spirit and of flesh, shall be called upon earth evil spirits, and on earth shall be their habitation. Evil spirits shall proceed from their flesh, because they were created from above; from the holy Watchers was their beginning and primary foundation. Evil spirits shall they be upon earth, and the spirits of the wicked shall they be called. The habitation of the spirits of heaven shall be in heaven; but upon earth shall be the habitation of terrestrial spirits, who are born on earth.
9. The spirits of the giants shall be like clouds, which shall oppress, corrupt, fall, content, and bruise upon earth.
10. They shall cause lamentation. No food shall they eat; and they shall be thirsty; they shall be concealed, and shall not rise up against the sons of men, and against women; for they come forth during the days of slaughter and destruction.