In addition to the verses in
Daniel 12:1-3 about the resurrection, there are a couple more in the Old Testament.
It seems Job believed in a resurrection.
ref
Job 19:25-27
25 I know that my Redeemer lives,
and that in the end he will stand upon the earth.
26 And after my skin has been destroyed,
yet in my flesh I will see God;
27 I myself will see him
with my own eyes—I, and not another.
How my heart yearns within me!
ref
Job 14:12-15
12 So man lieth down, and riseth not: till the heavens be no more, they shall not awake, nor be raised out of their sleep.
13 O that thou wouldest hide me in the grave, that thou wouldest keep me secret, until thy wrath be past, that thou wouldest appoint me a set time, and remember me!
14 If a man die, shall he live again? all the days of my appointed time will I wait, till my change come.
15 Thou shalt call, and I will answer thee: thou wilt have a desire to the work of thine hands.
and the book ends with
Job 42:17
17 So Job died, being old and full of days and it is written that he will rise again with those whom the Lord raises up.
David may have been speaking of his appointed time to wake up out of sleep at the resurrection when he said, "As for me, I will behold thy face in righteousness: I shall be satisfied, when I awake, with thy likeness."
Psalm 17:14
Isaiah 26:19-21 is taken by some to refer to a time of future tribulation and resurrection.
19 Thy dead men shall live, together with my dead body shall they arise. Awake and sing, ye that dwell in dust: for thy dew is as the dew of herbs, and the earth shall cast out the dead.
20 Come, my people, enter thou into thy chambers, and shut thy doors about thee: hide thyself as it were for a little moment, until the indignation be overpast.
21 For, behold, the LORD cometh out of his place to punish the inhabitants of the earth for their iniquity: the earth also shall disclose her blood, and shall no more cover her slain.