Hervarar Saga

Hervarar saga ok Heiðreks (The Saga of Hervör and Heidrek) is a legendary saga from the 13th century combining matter from several older sagas. It is a valuable saga for several different reasons beside its literary qualities. It contains traditions of wars between Goths and Huns, from the 4th century, and the last part is used as a source for Swedish medieval history. Moreover, it was an important source of inspiration for Tolkien when shaping his legends of Middle-earth. However, the saga may be most appreciated for its memorable imagery, as seen in a quote from one of its translators, Nora Kershaw Chadwick, on the invasion of the Horde:

Hervör standing at sunrise on the summit of the tower and looking southward towards the forest; Angantyr marshalling his men for battle and remarking dryly that there used to be more of them when mead drinking was in question; great clouds of dust rolling over the plain, through which glittered white corslet and golden helmet, as the Hunnish host came riding on.

The commentary by the editor and translator Christopher Tolkien is generally accepted, and it agrees with this article, save where a note indicates differently.

The saga deals with the sword Tyrfing and how it was forged and cursed by the Dwarves Dvalinn and Durin for king Svafrlami. Later, he lost it to the berserker Arngrim from Bolmsö who gave it to his son Angantyr. Angantyr died during a fight on Samsø against the Swedish hero Hjalmar, whose friend Orvar-Odd buried the cursed sword in a barrow together with Angantyr. From the barrow it was retrieved by Angantyr's daughter, the shieldmaiden Hervor who summoned her dead father to claim her inheritance. Then the saga continues with her and her son Heidrek, the king of Reidgotaland. Between his sons Angantyr and Hlod, there is a great battle about their father's heritage and Hlod is aided by the Huns. However, Hlod is defeated and killed.

...
Wikipedia