HKB
Fell, and about her hall was a flaming fire, and she had made a vow to have as a husband that man, only, who dared to ride through the flame.
"Then Sigurd and the Gjukings (who are also called Niflungs) rode up upon the fell, and Gunnar was minded to ride through the flame. He had the horse that was named Goti, but the horse did not dare to leap into the fire. Then Sigurd and Gunnar changed their shapes and also their names, since Grani would not go under any man except Sigurd. Then Sigurd leaped upon Grani and rode through the flaming fire. That night he held a wedding with Brynhild, and when they came to bed he drew the sword Gram out of its scabbard and laid it between them. And in the morning, when he awoke and dressed himself, then he gave Brynhild as a bridal gift the gold ring which he had taken on the Glittering Heath, and Loki had taken from Andvari, and he took from her another ring as a remembrance. Sigurd then leaped upon his horse and rode to his companions; Gunnar and he again changed their shapes and they went back to Gjuki with Brynhild. Sigurd had two children with Gudrun: Sigmund and Swanhild.
"It was once upon a time that Brynhild and Gudrun went to the water to bleach their hair. When they came to the river, Brynhild waded out into the water away from the land and said that she would not have on her head the water that ran out of Gudrun's hair, since she had the more noble husband. Then Gudrun went out into the river after Brynhild and said that she should wash her hair in the river above, because she had the husband who was braver than anyone else in the world, since he slew Fafnir and Regin and gained the inheritance of them both. Then Brynhild replied: 'It was of still greater renown that Gunnar rode the flaming fire and Sigurd dared not.' Then Gudrun laughed and said: 'Do you think that Gunnar rode through the flaming fire? Him I deem to have gone to bed with you, who gave me this gold ring. But the ring that you have on your hand, and that you received as a bridal gift, that is called the Ring of Andvari, and I deem that it was not Gunnar who sought it on the Glittering Heath.' Then Brynhild was silent and went home. After that she egged on Gunnar and Högni to kill Sigurd, but because they had sworn oaths with him they egged on Gotthorm, their brother, to kill him. Gotthorm laid sword on him while he slept, and when he felt the wound he hurled the sword Gram after his slayer so that it cut the man asunder. Then Sigurd fell and his three-year old son, who was named Sigmund, whom they killed. After that, Brynhild turned sword upon herself and she was burned with Sigurd. And Gunnar and Högni took the treasure of Fafnir and the Ring of Andvari and ruled all the land.