In stanzas 54 and 55 of the poem Völuspá, a völva tells Odin that his son Víðarr will avenge Odin's death at Ragnarök by stabbing Fenrir in the heart: In stanzas 51 and 53 of Vafthrúdnismál, Vafþrúðnir states that Víðarr and his brother Váli will both live in the "temples of the gods" after Surtr's fire has ceded and that Víðarr will avenge the death of his father, Odin, by sundering the cold jaws of Fenrir in battle: In stanza 17 of Grímnismál, during Odin's visions of various dwelling places of the gods, he describes Víðarr's (anglicized as "Vidar") residence: According to Lokasenna, Loki rebukes the gods at the start of the poem for not properly welcoming him to the feast at Ægir's hall.
In stanza 10, Odin finally relents to the rules of hospitality, urging Víðarr to stand and pour a drink for the quarrelsome guest.
[7] According to some mythologists, he owed this peculiar footgear to his mother Grid, who, knowing that he would be called upon to fight against fire on the last day, designed it as a protection against the fiery element, as her iron gauntlet had shielded Thor in his encounter with Geirrod.
[8] In chapter 54, following Ragnarök and the rebirth of the world, it is told that Víðarr along with his brother Váli will have survived both the swelling of the sea and the fiery conflagration unleashed by Surtr, completely unharmed, and shall thereafter dwell on the field Iðavöllr, "where the city of Asgard had previously been".
[11] Later in the book, various kennings are given for Víðarr, including again the "silent As", "possessor of the iron shoe", "enemy and slayer of Fenrisulf", "the gods' avenging As", "father's homestead-inhabiting As", "son of Odin", and "brother of the Æsir".
[15] The mid-11th century Gosforth Cross, located in Cumbria, England, has been described as depicting a combination of scenes from the Christian Judgement Day and the pagan Ragnarök.
[16] The cross features various figures depicted in Borre style, including a man with a spear facing a monstrous head, one of whose feet is thrust into the beast's forked tongue and on its lower jaw, while a hand is placed against its upper jaw, a scene interpreted as Víðarr fighting Fenrir.