Codex Regius
In the Edda, the poem is a sequel to "Helgakviða Hjörvarðssonar" whose heroes Helgi Hjörvarðsson and Sváfa are reborn as Helgi Hundingsbane and Sigrún. However, in Codex Regius, it is actually followed by "Helgakviða Hjörvarðssonar".