Ynglinga saga
In the "Heimskringla" book "Ynglinga saga", written in the 13th century by Snorri Sturluson, Hel is referred to, though never by name. In chapter 17, the king Dyggvi dies of sickness. A poem from the 9th-century "Ynglingatal" that forms the basis of "Ynglinga saga" is then quoted that describes Hel's taking of Dyggvi: