Old Testament Sheol

All the dead go down to Sheol, and there they lie in sleep together–whether good or evil, rich or poor, slave or free (Job 3:11-19). It is described as a region "dark and deep," "the Pit," and "the land of forgetfulness," cut off from both God and human life above (Pss. 6:5; 88:3-12). Though in some texts Yahweh's power can reach down to Sheol (Ps. 139:8), the dominant idea is that the dead are abandoned forever. This idea of Sheol is negative in contrast to the world of life and light above, but there is no idea of judgment or of reward and punishment. If one faces extreme circumstances of suffering in the realm of the living above, as did Job, it can even be seen as a welcome relief from pain–see the third chapter of Job. But basically it is a kind of "nothingness," an existence that is barely existence at all, in which a "shadow" or "shade" of the former self survives (Ps. 88:10).

This rather bleak (or comforting, depending on your point of view) understanding of the future (or non-future) of the individual at death is one that prevails throughout most of the Hebrew Bible. It is found throughout the Pentateuch (the Books of Genesis, Exodus, Leviticus, Numbers, and Deuteronomy), and it runs through the books of history, poetry, and prophecy (from Joshua through Malachi) with few exceptions. Those exceptions, however, are noteworthy. The most obvious is the infamous account of the seance in which King Saul has the "witch" (or medium) of Endor conjure up the spirit of the dead prophet Samuel. The narrative is fascinatingly realistic. The medium asks Saul, "Whom shall I bring up for you?" Saul replies, "Bring up Samuel for me" (1 Sam. 28:11). What follows is worth quoting in full:

The king said to her, "Have no fear; what do you see?" And the woman said to Saul, "I see a god (elohim) coming up out of the earth." He said to her, "What is his appearance?" And she said, "An old man wrapped in a robe." And Saul knew that it was Samuel, and he bowed with his face to the ground, and did obeisance. Then Samuel said to Saul, "Why have you disturbed me by bringing me up?" (I Sam. 28:13-15) (my emphasis)
Saul's intent in trying to contact Samuel was to consult him regarding the wisdom of going into battle against the Philistines. Samuel appears to him in bodily form and gives him a clear prediction of what would befall him, just as he would have done in his prophetic ministry while still alive, he clearly knows the future, even though he has departed below, to Sheol.

Here the dead (at least Samuel) are viewed as "gods" of sorts, resting below in Sheol, but potentially capable of "coming back"–after being "disturbed"–and participating in the life of the living to the extent of even knowing the future. The practice of consulting the spirits of the dead was strictly forbidden in both the Torah and Prophets, but it obviously went on persistently (see Deut. 18:11; Isa. 8:19, 29:4). Throughout this period Israelites apparently thought that the dead could be consulted on behalf of the living. This indicates that their view of the state of the dead in Sheol below was not entirely static. Although generally pictured "at rest," such spirits could assume special power and still have verbal intercourse with the living world above. Some have also noted as exceptions texts such as Psalms 73:18-26 and 49:13-15, which contrast the fate of the wicked as perishing in Sheol with that of the righteous, who will somehow be "ransomed" from its power. These texts are impossible to date with any certainty, and they might reflect some beginning "hints" of an idea of a resurrection hope for the departed righteous. If so, they probably come from the late Persian period. But even these texts lack a clear affirmation of resurrection of the dead. They might reflect the mere notion of God saving one from Sheol, i.e., rescuing from danger, sickness, and prolonging life. This is clearly the sense of passages like Psalms 22:19-24 and 103:1-5, Isaiah 38:10-20, and Jonah 2:1-9. It is only in certain late portions of the Hebrew Bible, and in sections of the Apocrypha, that we find the beginning expressions of any kind of an actual "future" for the individual beyond death. These will be discussed later in this chapter.