'Spirits' in the Bible

“Then the spirit of the Egyptians will become exhausted within them and emptied out;And I will confuse their strategy,So that they will consult the idols and the spirits of the dead,And mediums and soothsayers.

“But these two things shall come to you abruptly, in one day:Loss of children and widowhood.They will come on you in full measureIn spite of your many [claims of power through your] sorceries,In spite of the great power of your enchantments.

Who sit among the graves [trying to conjure up evil spirits] and spend the night in the secret places [where spirits are thought to dwell];Who eat swine’s flesh,And their pots hold the broth of unclean meat;