In chapter 13 of the Prose Edda book Gylfaginning, Fenrir is first mentioned in a stanza quoted from Völuspá. Fenrir is first mentioned in prose in chapter 25, where the enthroned figure of High tells Gangleri (described as King Gylfi in disguise) about the god Týr. High says that one example of Týr's bravery is that when the Æsir were luring Fenrir (referred to here as Fenrisúlfr) to place the fetter Gleipnir on the wolf, Týr placed his hand within the wolf's mouth as a pledge. This was done at Fenrir's own request because he did not trust that the Æsir would let him go. As a result, when the Æsir refused to release him, he bit off Týr's hand at a location "now called the wolf-joint" (the wrist), causing Týr to be one-handed and "not considered to be a promoter of settlements between people. "