Iðunn appears and speaks during Loki's flyting (insult contest) in Ægir's hall.
**Poem Introduction:** Iðunn is referred as Bragi’s wife.
**Stanza 16-17-18:** After Loki insults Bragi, Iðunn intervenes.
Iðunn said:
16. ‘I ask, Bragi — the ties of blood-children
and of all adopted sons are strong —
that you don’t address Loki with insulting staves
in Ægir’s hall!’
Loki said:
17. ‘Silence, Iðunn! I say that of all women
you’re the most man-eager,
since you laid your splendidly washed arms
around your brother’s slayer!’
Iðunn said:
18. ‘I shan’t address Loki with insulting staves
in Ægir’s hall;
I’ll calm Bragi, [who’s] high on beer,
I don’t want you two wrathful ones to fight!
Chapter 25-27(p.25): Idunn is introduced as Bragi’s wife and the keeper of the apples of youth.
‘Idunn is his wife. She keeps in her casket apples which the gods have to feed on when they age, and then they all become young, and so it will go on right up to Ragnarok.’
Introduction(p.59-60): Idunn is listed among the Asyniur at Ægir's feast. The primary narrative involving her abduction by the giant Thjazi is told in full. Loki, to save his own life, swears an oath to lure Idunn and her apples out of Asgard. He does so, the gods begin to age, and they force Loki to rescue her.
He shouted and begged the eagle most earnestly for a truce but it said that Loki would never get free unless he vowed solemnly to get Idunn to come outside Asgard with her apples, and Loki accepted. [...] But the Æsir were badly affected by Idunn’s disappearance and soon became grey and old. [...] Then Loki was arrested and brought to the parliament and he was threatened with death or torture.
Chapter 8-16(p.76): A kenning for Bragi is "Idunn’s husband," and for Loki, "thief... of Idunn’s apples."
How shall Bragi be referred to? By calling him Idunn’s husband, inventor of poetry (brag) and the long-bearded As.
How shall Loki be referred to? By calling him [...] thief from giants, of goat and Brisingamen and Idunn’s apples...
Chapter 18-22(p.86): The primary kennings for Idunn are listed.
How shall Idunn be referred to? By calling her wife of Bragi and keeper of the apples, and the apples the Æsir’s old-age cure. She is also giant Thiassi’s booty in accordance with the story told above about his abducting her from the Æsir.
Chapter 22(p.87-88): In verses from the poem Haustlǫng, Idunn is referred to as the "maid who knew the Æsir’s old-age cure" and the "gods’ lady".
The scion of Hymir’s race [giants] instructed the crew-guider, crazy with pain, to bring to him the maid who knew the Æsir’s old-age cure [Idunn]. The thief of Brising’s girdle [Brisingamen] afterwards caused the gods’ lady [Idunn] to go into the rock-Nidud’s [giant’s] courts to Brunnakr’s bench.
Chapter 32-33(p.95): Idunn is listed as one of the goddesses who attended the feast with Odin at Ægir's hall.
Undertaking this journey were first of all Odin and Niord, Freyr, Tyr, Bragi, Vidar, Loki, and then Asyniur, Frigg, Freyia, Gefiun, Skadi, Idunn, Sif.
Chapter 75(p.157): Idunn is named in a list of the Asyniur.
Now shall all the Asyniur be named. Frigg and Freyia, Fulla and Snotra, Gerd and Gefiun, Gna, Lofn, Skadi, Iord and Idunn, Ilm, Bil, Niorun.