The Yin and Yang of roosters, one for the Gods and another for the dead!

Voluspa - Norse Mythology Book - Verse 43

“ Then to the gods |  crowed Gollinkambi,

He wakes the heroes |  in Othin’s hall;

And beneath the earth |  does another crow,

The rust-red bird |  at the bars of Hel.”

Bellows Translation