These Angels or Nephilim make their first appearance in

Now a population explosion took place on the earth. It was at this time that beings from the spirit world looked upon the beautiful earth women and took any they desired to be their wives. Then Jehovah said: “My spirit must not be forever disgraced by man (Adam), wholly evil he is. I will give him 120 years to mend his ways.” (Adam died 120 years later). In those days and even afterwards, when the evil beings (Nephilim) from the spirit world were sexually involved with human women, their children became Giants, of whom so many legends (Mythology) are told.

Genesis 6:1-4 (Living Bible)

So they brought to the people of Israel an evil report of the Land which they had spied out, saying, “The Land through which we have gone to spy out, is a land that devours its inhabitants; and all the people that we saw in it are men of great stature. And there we saw the Nephilim and the sons of Anak, who come from the Nephilim; and we seemed to ourselves like grasshoppers and so we seemed to them.”

Numbers 13:32-33

And after this there arose war with the Philistines at Gezer; then Sibecai the Hushathite slew Sippai, who was one of the descendants of the Giants (Nephilim) and the Philistines were subdued. And there was again war with the Philistines; and Elhanan the son of Jair slew Lahmi the brother of Goliath the Gittite, the shaft of whose spear was like a weavers beam. And there was again war at Gath, there was a man of great stature who had six fingers on each hand and six toes on each foot, twenty-four in number: and he was a descendant of the Giants (Nephilim). And when he taunted Israel, Jonathan the son of Shimea, David’s brother slew him. These were descended from the Giants (Nephilim) in Gath and they fell by the hand of David and his servants.

1 Chronicles 20:4-8

By the foregoing it is evident that Angels can procreate if they choose to or if they are commanded to by their lord (Satan). The offspring of a celestial and terrestrial produces a gigantic beast. What did the early church have to say about these particular Nephilim?

And the Angels that did not keep their own position but left their proper dwelling (Celestial) have been kept in eternal chains in the nether gloom until the judgement of the great day; just as Sodom and Gomorrah and the surrounding cities that also acted immorally and indulged in unnatural lust serve as an example by undergoing a punishment of eternal fire.

Jude 1:6-7

For if God did not spare the angels when they sinned but cast them into hell and committed them to pits of nether gloom to be kept until the judgement.

2 Peter 2:4

What about Satan and the rest of his angels? Are they not fighting with Michael and his angels, trying to keep the heavenly real estate that was apportioned to him before his fall? But after Michael cleanses the Heavenlies and only the planet earth remains, Satan’s domain, then What?

And another portent appeared in the heaven: behold a great red dragon with seven heads and ten horns, and seven diadems upon his head. His tail swept down a third of the stars (Nephilim) of heaven, and cast them to the earth.

Rejoice then o heaven and you that dwell therein! But woe to you O earth and Sea, for the devil has come down to you in great wrath, because he knows that his time is short!

Revelation 12:4,12

These scriptures will be fulfilled about three and one half years before the end of this present dispensation. At about the same time as the Bride of Christ is taken up, the Beast (Son of Perdition) slain and the 144,000 Israelites sealed. Michael and his Angels will cast Satan and his angels to earth when coming for the Bride of Christ (see subject on Daniel’s 70th Week).