Editing Svaðilfari (section)

===''Gylfaginning''===
In chapter 42 of the ''[[Prose Edda]]'' book ''[[Gylfaginning]]'', [[High, Just-As-High, and Third|High]] tells a story set in the early days and after the gods had established [[Midgard]] and built [[Valhöll]] about an unnamed builder who offered to build a fortification for the gods to protect them from {{lang|non|[[Jötunn|bergrisar]]}} and {{lang|non|[[Jötunn|hrímþursar]]}}. Under [[Loki]]'s advice, it was agreed that if the work was completed in one winter with the help of his horse Svaðilfari, the builder would be given [[Freyja]], the [[Sól (Sun)|sun]], and the [[Máni|moon]]. With Svaðilfari's help, the builder made fast progress on the wall, and three days before the deadline of summer, the builder was nearly done.{{sfn|Faulkes|1987}}{{sfn|Gylfaginning (ON)}}

Because of his role in the making of the wager, the gods declared that Loki would face severe repercussions if he did not think of a way to cause the builder fail to complete his task. That night, the builder drove out to fetch stones with Svaðilfari, and out from the woods, into the clearing, ran a beautiful mare who was, in fact, Loki in disguise. Svaðilfari saw the mare and became frantic, chasing her into the woods. As the two horses ran around all night, the building work could not be finished in time and realising this, the builder went into a rage ({{langx|non|jötunmóð}}), revealing he was a {{lang|non|[[bergrisi]]}}.{{sfn|Faulkes|1987}}{{sfn|Gylfaginning (ON)}}

When the Æsir realised the builder's identity, they disregarded their previous oaths with the builder and called for [[Thor]] who killed the builder with [[Mjöllnir]]. Due to his night with Svaðilfari, Loki became pregnant and later gave birth to the eight legged horse [[Sleipnir]].{{sfn|Faulkes|1987}}{{sfn|Gylfaginning (ON)}}