In chapter 157 of "Njáls saga", a man named Dörruð witnesses 12 people riding together to a stone hut on Good Friday in Caithness. The 12 go into the hut and Dörruð can no longer see them. Dörruð goes to the hut, and looks through a chink in the wall. He sees that there are women within, and that they have set up a particular loom; the heads of men are the weights, the entrails of men are the warp and weft, a sword is the shuttle, and the reels are composed of arrows. The women sing a song called "Darraðarljóð", which Dörruð memorizes.