 Iðunn is introduced in the Prose Edda in section 26 of the Prose Edda book Gylfaginning . Here , Iðunn is described as Bragi 's wife and keeper of an <unk> ( a wooden box made of ash wood and often used for carrying personal possessions ) within which she keeps apples . The apples are bitten into by the gods when they begin to grow old and they then become young again , which is described as occurring up until Ragnarök . Gangleri ( described as King Gylfi in disguise ) states that it seems to him that the gods depend greatly upon Iðunn 's good faith and care . With a laugh , High responds that misfortune once came close , that he could tell Gangleri about it , but first he must hear the names of more of the Æsir , and he continues providing information about gods . 
