1 Enoch 10:11
10 And no request that they (i.e. their fathers) make of thee shall be granted unto their fathers on their behalf; for they hope to live an eternal life, and that each one of them will live five hundred years.' 11 And the Lord said unto Michael: 'Go, bind Semjâzâ and his associates who have united themselves with women so as to have defiled themselves with them in all their uncleanness. 12 And when their sons have slain one another, and they have seen the destruction of their beloved ones, bind them fast for seventy generations in the valleys of the earth, till the day of their judgement and of their consummation, till the judgement that is for ever and ever is consummated. 13 In those days they shall be led off to the abyss of fire: 〈and〉 to the torment and the prison in which they shall be confined for ever. And whosoever shall be condemned and destroyed will from thenceforth be bound together with them to the end of all generations.
2 Peter 2:4
3 And in their greed they will exploit you with deceptive words. Their condemnation pronounced long ago is not sitting idly by; their destruction is not asleep. 4 For if God did not spare the angels who sinned, but threw them into Tartarus16 and locked them up in chains in utter darkness, to be kept until the judgment, 5 and if he did not spare the ancient world, but did protect Noah, a herald of righteousness, along with seven others, when God brought a flood on an ungodly world, 6 and if he turned to ashes the cities of Sodom and Gomorrah when he condemned them to destruction, having appointed them to serve as an example to future generations of the ungodly, 7 and if he rescued Lot, a righteous man in anguish over the debauched lifestyle of lawless men,
Notes and References
"... The New Testament epistles Jude and 2 Peter, however, use ζόφου as a synonym for Hades. Both use ζόφου when recounting traditions familiar from the Book of the Watchers. Jude 6 recalls the story of the watchers, specifically the detail that the angels did not keep their assigned position but left their proper dwelling in heaven (compare 1 Enoch 6:6; 12:4; 15:3–7; and 15:10). As a result, Jude 6 notes, the angels are kept under darkness until the day of judgment. Jude 13 also alludes to wandering stars, known from 1 Enoch 18:14–15 and 21:6, that are imprisoned in the eternal darkness. 2 Pet 2:4 refers to the watchers cast into Tartarus (1 Enoch 10:4–6; 10:12–14; 14:5; 19:1; 21:10) and committed to the deepest darkness ..."
Bautch, Kelley Coblentz A Study of the Geography of 1 Enoch 17-19: “No One Has Seen What I Have Seen.” (p. 51) Brill, 2003