In Norse mythology, the einherjar (lone-fighters) are warriors who have died in battle and are brought to Valhalla by valkyries. In Valhalla, the einherjar eat meat from the boar called Sæhrímnir. Every day he is boiled and every night he becomes whole again. They drink mead provided by a goat named Heiðrún. Every day they dress for battle and go out and fight each other. This is to prepare for the events of Ragnarök (the end of the world).
- John Lindow, Norse Mythology: A Guide to Gods, Heroes, Rituals, and Beliefs (Oxford; New York: Oxford University Press, 2002), p. 104
- Kathleen N Daly; Marian Rengel, Norse Mythology A to Z (New York: Chelsea House Publishers, 2010), p. 111
- Paul Belloni Du Chaillu, The Viking Age (New York: C. Scribner's Sons, 1890), p. 427
- Collier's new Encyclopedia (New York: P.F. Collier, 1921), p. 154
- Charles Russell Coulter; Patricia Turner, Encyclopedia of Ancient Deities (New York; Oxford: Routledge, 2012), p. 164
- Ideology and Power in the Viking and Middle Ages, ed. Gro Steinsland (Leiden; Boston: Brill, 2011), p. 297