In chapter 50 of Gylfaginning, to punish Loki for his crimes, the Æsir turn his son Váli into a wolf and he dismembers his brother, "Nari or Narfi", whose entrails are then used to bind their father.
Nú var Loki tekinn griðalauss ok farit með hann í helli nökkvorn.
And the Æsir took his entrails and bound Loki with them over the three stones: one stands under his shoulders, the second under his loins, the third under his houghs; and those bonds were turned to iron.
[4][5] The name Narfi has often been changed to Váli to better conform to the Prose Edda account; for example in Guðni Jónsson's 1954 edition and in Henry Adams Bellows' 1923 English translation.
— Codex Regius text as edited by Ursula Dronke[7] After that Loki hid himself in Fránangr's Fall, in the shape of a salmon.