What is the name of the Nordic myth in the hands of the fat old man in Thor?

Nordic mythology (Scandinavian mythology of Iceland, Sweden, Norway and Denmark) has been handed down by two ancient books, Eda and Saga. Studying Nordic mythology is the most precious material. The story of God and Jordan (the giant). Odin, Doyle, Friga, Baldell, Foley, Freya, Loki.