The she-goat that stands at the hall Valhalla, grazing on the branches of the tree Læraðr. The mead that flows from her udders is served to the einherjar. She is attested in the eddic poem Grímnismál:
- Heithrun is the goat
- who stands by Heerfather's hall,
And the branches of Laerath she bites;
The pitcher she fills
- with the fair, clear mead,
Ne'er fails the foaming drink.
- — Bellows trans.
Snorri Sturluson in Gylfaginning adds that Heiðrún fills a tun every day, and that tun is so great that all the champions become quite drunk from it.
- Grímnismál, 25.
- Gylfaginning, 39.