The reverence for cats in Norse culture manifested in various ritual practices and sacred observances. Harming a cat, particularly one associated with a household or a religious practitioner, was considered not just cruel but spiritually dangerous, likely to bring curse and misfortune upon the perpetrator.
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The ninth is Folkvangr, there Freyja rules / Over who shall have a seat in the hall; / Half of the slain, she choose each day, / The other half is Odin’s.” Grímnismál – Sayings of Grimnir | Poetic Edda