'Netherworld' in the Bible

I made the nations quake at the sound of its fall when I cast it down to Sheol with those who descend into the pit; and all the well-watered trees of Eden, the choicest and the best of Lebanon, will be comforted in the earth beneath [at Assyria’s downfall].

“Which among the trees of Eden do you equal in glory and in greatness [O Egypt]? Yet you [also] will be brought down with the trees of Eden to the earth beneath (nether world). You will lie among the uncircumcised (the barbaric, the boorish, the crude) with those who were slain by the sword. This is how it shall be with Pharaoh and all his hordes!”’ says the Lord God.”

“Son of man, wail over the hordes of Egypt and cast them down, both her and the daughters of the powerful and majestic nations, to the nether world (the place of the dead), with those who go down to the pit;

The strong among the mighty rulers will say of him (Pharaoh) and his allies from the midst of Sheol, ‘They have gone down [defeated]; they lie still, the uncircumcised, slain by the sword.’

“Elam [a conquest of Assyria] is there and all her hordes around her grave; all of them slain, fallen by the sword, who have gone down uncircumcised to the lower parts of the earth, who made their terror spread in the land of the living and bore their shame and defeat with those who went down to the pit.

Nor do they lie beside the fallen heroes of the uncircumcised, who went down to Sheol with their weapons of war, whose swords were laid [with honors] under their heads. The punishment for their sins rested on their bones, for the terror of these heroes was once in the land of the living.

Even if they could dig down into the netherworld, my hand would pull them up from there. Even if they could climb up to heaven, I would drag them down from there.

I went down to the very bottoms of the mountains; the gates of the netherworld barred me in forever; but you brought me up from the Pit, O Lord, my God.