Eymundar þáttr hrings is a short Norse saga

Saga

Sagas, are stories in Old Norse about ancient Scandinavian and Germanic history, etc.Saga may also refer to:Business*Saga DAB radio, a British radio station*Saga Airlines, a Turkish airline*Saga Falabella, a department store chain in Peru...

, which is preserved in two versions. One of them appears as Eymundar þáttr hrings in the Flatey Book and the other one is an introductory chapter in Yngvars saga víðförla

Yngvars saga víðförla

Yngvars saga víðförla is a legendary saga said to have been written in the twelfth century by Oddr Snorrason. Scholars have been skeptical towards this claim but in recent years it has gained more acceptance....

. They deal with the adventures of Varangians

Varangians

The Varangians or Varyags , sometimes referred to as Variagians, were people from the Baltic region, most often associated with Vikings, who from the 9th to 11th centuries ventured eastwards and southwards along the rivers of Eastern Europe, through what is now Russia, Belarus and Ukraine.According...

 in the service of Yaroslav I the Wise

Yaroslav I the Wise

Yaroslav I, Grand Prince of Rus, known as Yaroslav the Wise Yaroslav I, Grand Prince of Rus, known as Yaroslav the Wise Yaroslav I, Grand Prince of Rus, known as Yaroslav the Wise (Old Norse: Jarizleifr; ; Old East Slavic and Russian: Ярослав Мудрый; Ukrainian: Ярослав Мудрий; c...

.

The main difference between the two versions is that in Eymundar þáttr hrings, the hero is a Norwegian, whereas Yngvars saga víðförla describes him as a Swede.