Thor's daughter, Þrúðr, was promised in marriage to Alvíss. Thor was unhappy with the match, however, so he devised a plan: Thor told Alvíss that, because of his small height, he had to prove his wisdom. Alvíss agreed, but Thor made his tests last until dawn, when Alviss, because he was a dwarf, was petrified on being exposed to the sunlight.
See also edit
- Alvíssmál, the poem containing most of the information on Alviss