Daniel 12:1-2, "And at that time shall Michael stand up, the great prince which standeth for the children of thy people: and there shall be a time of trouble, such as never was since
there was a nation even to that same time: and at that time thy people shall be delivered, every one that shall be
found written in the
book. And many of them that
sleep in the dust of the
earth shall awake, some to
everlasting life, and some to
shame and everlasting contempt."
Revelation 11:15, "And the seventh angel sounded; and there were great voices in heaven, saying, The
kingdoms of this world are become the
kingdoms of our Lord, and of his Christ; and he shall
reign for ever and ever.
Revelations 11:18, "And the
nations were angry, and thy wrath is
come, and the
time of the dead, that
they should be judged, and that
thou shouldest give reward unto
thy servants the
prophets, and to the
saints, and them
that fear thy name, small and great; and shouldest
destroy them which destroy the
earth."
The
time of Jacob's trouble is considered to
be the great tribulation period of 1,260
days. It does sound like the Old Testament
saints may be resurrected at the beginning
of Jesus' 1,000 year reign on Earth after
He comes back to Earth or right before He
returns to Earth at the end of the 1,260
day Great Tribulation period.