Volsunga Saga - Chapter XXVII: The Wooing of Brynhild Unknown Author (Ft. Translated by William Morris and Eirikr Magnusson)

Now they array them joyously for their journey, and ride over hill and dale to the house of King Budli, and woo his daughter of him; in a good wise he took their speech, if so be that she herself would not deny them, but he said withal that so high- minded was she, that that man only might wed her whom she would.

Then they ride to Hlymdale, and there Heimir gave them good welcome; so Gunnar tells his errand; Heimir says, that she must needs wed but him whom she herself chose freely; and tells them how her abode was but a little way thence, and that he deemed that him only would she have who should ride through the flaming fire that was drawn round about her hall; so they depart and come to the hall and the fire, and see there a castle with a golden roof-ridge, and all round about a fire roaring up.

Now Gunnar rode on Goti, but Hogni on Holkvi, and Gunnar smote his horse to face the fire, but he shrank aback.

Then said Sigurd, "Why givest thou back, Gunnar?"

He answered, "The horse will not tread this fire; but lend me thy horse Grani."

"Yea, with all my good will," says Sigurd.

Then Gunnar rides him at the fire, and yet nowise will Gram stir, nor may Gunnar any the more ride through that fire. So now they change semblance, Gunnar and Sigurd, even as Grimhild had taught them; then Sigurd in the likeness of Gunnar mounts and rides, Gram in his hand, and golden spurs on his heels; then leapt Grani into the fire when he felt the spurs; and a mighty roar arose as the fire burned ever madder, and the earth trembled, and the flames went up even unto the heavens, nor had any dared to ride as he rode, even as it were through the deep mirk.

But now the fire sank withal, and he leapt from his horse and went into the hall, even as the song says --

    "The flame flared at its maddest,
    Earth's fields fell a-quaking
    As the red flame aloft
    Licked the lowest of heaven.
    Few had been fain,
    Of the rulers of folk,
    To ride through that flame,
    Or athwart it to tread.