A few more scriptures which implicitly or explicitly reference the Hollow Earth:
- Mosiah 12:36, 13:12; Exodus 20:4: Abinadi condemns worship of underground creatures
- Isaiah 14: Satan's Ultimate Goal is to Invade the Inner Earth
- Genesis 3; Moses 4: Egyptian Knowledge of the Genesis Creation Story - Serpent (Reptilian) on TWO LEGS!!!
- Arguably the entire creation account of the Earth in Genesis 1 appears to be told from the perspective of the interior of the Earth, creating a hollow orb from the inside out.
- Jacob 5, Book of Mormon. In this chapter, it states 6 times that the Lord of the vineyard cut off the young and tender branches of the old tame olive tree (which tree he used to symbolize the house of Israel), and that these tender branches were then dispersed and planted in the "Nethermost Parts of the Lord's Vineyard." See: Jacob 5:13, 14, 19, 38, 39, 52.
And these will I place in the nethermost part of my vineyard, whithersoever I will... and I do it that I may preserve unto myself the natural branches of the tree; and also, that I may lay up fruit thereof against the season, unto myself; for it grieveth me that I should lose this tree and the fruit thereof.
And it came to pass that the Lord of the vineyard went his way, and hid the natural branches of the tame olive-tree in the nethermost parts of the vineyard, some in one and some in another, according to his will and pleasure.
... [many more verses like this] - Ezekiel 31:14, 16, 18; Ezek. 32:18, 24:
for they are all delivered unto death, to the Nether Parts of the Earth . . . with
them that go down to the pit. - I've also heard others correlate the gold mentioned in Genesis 2:8-12 with Solomon's expedition to retrieve gold in 1 Kings 10, saying that his journey to Ophir also involved a visit to Eden
- Micah 4:1-7, Isaiah 2:2-4, Zechariah 14:16-21 all mention Christ reigning over the earth on Mount Zion, which is in the Hollow Earth and serves as the basis for Mount Olympus, etc.
- D&C 133 famously mentions the Lost Ten Tribes coming down from the Far North.
Honestly, though, even this list only scratches the surface. I believe there are literally dozens, and possibly hundreds, of more examples throughout the scriptures of explicit and implicit mentions to the inner earth. Anything mentioning "things under the earth," or "things in the earth" as well. It would be amazing if someone made an exhaustive concordance to all inner-earth mentions throughout the scriptures.