Numbers 16:23-33 The hells are under the earth

23 And the Lord spake unto Moses, saying,

24 Speak unto the congregation, saying, Get you up from about the tabernacle of Korah, Dathan, and Abiram.

25 And Moses rose up and went unto Dathan and Abiram; and the elders of Israel followed him.

26 And he spake unto the congregation, saying, Depart, I pray you, from the tents of these wicked men, and touch nothing of their's, lest ye be consumed in all their sins.

27 So they gat up from the tabernacle of Korah, Dathan, and Abiram, on every side: and Dathan and Abiram came out, and stood in the door of their tents, and their wives, and their sons, and their little children.

28 And Moses said, Hereby ye shall know that the Lord hath sent me to do all these works; for I have not done them of mine own mind.

29 If these men die the common death of all men, or if they be visited after the visitation of all men; then the Lord hath not sent me.

30 But if the Lord make a new thing, and the earth open her mouth, and swallow them up, with all that appertain unto them, and they go down quick into the pit; then ye shall understand that these men have provoked the Lord.

31 And it came to pass, as he had made an end of speaking all these words, that the ground clave asunder that was under them:

32 And the earth opened her mouth, and swallowed them up, and their houses, and all the men that appertained unto Korah, and all their goods.

33 They, and all that appertained to them, went down alive into the pit, and the earth closed upon them: and they perished from among the congregation.

-Numbers 16:23-33King James Version (KJV)

Arcana Coelestia, by Emanuel Swedenborg, [1749-56], tr. by John F. Potts [1905-10], at sacred-texts.com

8306

The earth swallowed them. ...the signification of "to be swallowed by the earth," as being damnation and hell; for by this swallowing is signified a falling down, or casting down, into hell; moreover hell is deep down below, because it is very far from the sun of heaven, which is the Lord, and there is what is Most High. Removals from thence are according to the qualities and quantities of evils and the derivative falsities. Hence it is that heaven appears above, and hell beneath. Moreover the place where they are who are in falsities from evil, consequently in damnation, appears like a desert land, which is called "the damned land," under which are cast down those who are cast into hell (n. 7418). That this takes place by virtue of the mere presence of the Lord, see n. 8265. 

Spiritual Diary, by Emanuel Swedenborg, [1758], tr. by Bush, Smithson and Buss [1883-9] at sacred-texts.com

4545
CONCERNING THE HELLS. Sometimes evil spirits are let down into the hells and led about, and thence are shown, as to their quality, to the angels. At first, they are led according to their cupidities [a strong feeling of wanting to have something] [derived] from the natural life in the world. I saw this on two occasions: the two [spirits led about] were known by me, in the life of the body, and were then held in respect. Thence I was also instructed, what is the situation of the hells. The hells are under the earth,

[The earth here mentioned is not the natural earth, on which we live, but the earth of the spiritual world, which constitutes the lower part of the world of spirits - that is, the part of the world of spirits nearest to, and most closely associated with, hell.] 

beneath the left foot: [of heaven which in the form of a Grand Man] in front of this foot are the adulterers; and the deeper you descend, the more wicked and abominable the adulterers are. Under the right foot are cruel adulterers. A little in front, are robbers and flagitious [wicked and nasty] spirits; and the deeper you go the more flagitious they are. They dwell there in dusky and excrementitious [like excrement that is expelled from the body after digestion] caverns. This [region] extends for quite a considerable distance. Still more in front, for a great distance, are profane spirits, especially towards the right there, where there is a dark cloud in which they are enveloped.