Myths of the Norsemen: From the Eddas and Sagas

Loki’s last crime, and the one which filled his measure of iniquity, was to induce Hodur to throw the fatal mistletoe at Balder, whom he hated merely on account of his immaculate purity. Perhaps even this crime might have been condoned had it not been for his obduracy when, in the disguise of the old woman Thok, he was called upon to shed a tear for Balder. His action on this occasion convinced the gods that nothing but evil remained within him, and they pronounced unanimously upon him the sentence of perpetual banishment from Asgard.