Vok'sha
From Memory Alpha, the free Star Trek reference.
The Vok'sha were a species native to the planet Rakella Prime.
Their mythology included the belief that "hate" was a beast that lived inside the stomach. Their greatest mythical hero was a man who ate stones for 23 days to kill the beast and subsequently became a saint.
In 2371, while discussing demons in various species' mythology, Chakotay mentioned this to Tuvok. (VOY: "Heroes and Demons")
