This short phrase functions as an abbreviated, lay accessible echo of a much longer and older liturgical text, the Oharae no Kotoba, the Words of the Great Purification, recorded in the Engishiki of 927 CE and recited in full only by Shinto priests during formal purification ritual. Where the full norito runs to an extended, formal Old Japanese liturgical composition addressed to specific kami and cataloguing categories of impurity to be removed, harae tamae kiyome tamae compresses the entire request down to two paired imperative verbs, purify and cleanse, each repeated with the honorific tamae, without any of the mythological or ritual detail the full text carries, making it usable by an ordinary worshipper with no priestly training at the temizuya, the water basin for hand and mouth purification found at every shrine entrance.
Because no single canonical text prescribes this short form specifically, its exact wording shows some minor variation between shrines and regions, unlike the fixed and textually stable full norito it echoes, and its use is largely a modern development within lay devotional practice rather than an ancient fixed liturgical unit in its own right. It is also used in the cold water ascetic practice called misogi, where the phrase is repeated rhythmically during or after immersion, extending its use beyond the shrine basin into a broader ascetic context the formal priestly norito, tied to fixed ceremonial occasions, does not share in the same way.