But when Thjasse returned home and missed Idun, he took on his eagle-guise, flew after Loke, gaining on the latter with his eagle wings. When the asas saw the falcon coming flying with the nut, and how the eagle flew, they went to the walls of Asgard and brought with them bundles of plane-shavings. When the falcon flew within the burg, he let himself drop down beside the burg-wall. Then the asas kindled a fire in the shavings; and the eagle, being unable to stop himself when he missed the falcon, caught fire in his feathers, so that he could not fly any farther. The asas were on hand and slew the giant Thjasse within the gates of Asgard, and that slaughter is most famous.

- Prose Edda (Brage's Talk, II)