Sleipnir spear, which may be a valkyrie, and a female figure greets the rider with a cup. The scene has been interpreted as a rider arriving at the world of the dead. The mid-7th century Eggja stone bearing the Odinic name "haras" (Old Norse 'army god') may be interpreted as depicting Sleipnir. John Lindow theorizes that Sleipnir's "connection to the world of the dead grants a special poignancy to one of the kennings in which Sleipnir turns up as a horse word," referring to the skald Úlfr Uggason's usage of "sea-Sleipnir" in his "Húsdrápa", which describes the funeral of Baldr. Lindow
Horse worship a horse, Arion, which was capable of human speech. This bears some resemblance to the Norse mythology reference to the gender-changing Loki having turned himself into a mare and given birth to Sleipnir, "the greatest of all horses". Tacitus (Germania) mentions the use of white horses for divination by the Germanic tribes: In Gallo-Roman times, the worship of Epona was widespread in the north-western portions of the Roman Empire. The Welsh legend of Rhiannon and the Irish legend of Macha, although first recorded in Christian times, may indicate memories of horse worship. The white horse of Rhiannon is another example