norito read at a great purification event
A specific Shinto ritual prayer (norito) recited during the Ōharae (Great Purification) ceremony, typically held in June and December.
The Ōharae no kotoba is recited at the Great Purification ceremonies in June and December.
Compound of 大祓 (ōharae, 'great purification') + の (possessive particle) + 詞 (kotoba, 'words, prayer'). The term is specific to Shinto liturgy.