The
Book of Jubilees is an
apocryphal scripture which narrates the genesis of
angels on the first day of Creation and the story of how a group of
fallen angels known as the
grigori[?] mated with mortal females, giving rise to a race of giants known as the
Nephilim. The Nephilim which were in existence during the time of
Noah were wiped out by the great flood. However, biblical accounts found in
Numbers,
Deuteronomy, and
Joshua indicate that the Nephilim, as well as other races of giants who were the progeny of the Nephilim, were reconstituted after the flood, presumably by angels who fell from grace after the flood.