[Búri] gat son þann er Borr er nefndr. Hann fekk þeirar konu er Bestla er nefnd, dóttir Bölþorns jötuns, ok gátu þau þrjá sonu. Hét einn Óðinn, annarr Vili, þriði Vé.
[Búri] begat a son called Borr, who wedded the woman named Bestla, daughter of Bölthorn the giant; and they had three sons: one was Odin, the second Vili, the third Vé.
Brodeur's translation
Borr is not mentioned again in the Prose Edda. In skaldic and eddaic poetry Odin is occasionally referred to as Borr's son but no further information on Borr is given. Other sources are silent.
The role of Borr in the mythology is unclear and there is no indication that he was worshipped in Norse paganism.
References
Brodeur, Arthur Gilchrist (transl.) (1916). The Prose Edda by Snorri Sturluson. New York: The American-Scandinavian Foundation. Available online at http://www.northvegr.org/lore/prose/index.php''.