“Purge me with hyssop, and I shall be clean: wash me, and I shall be whiter than snow.”
King James Version (KJV)
51:7 Hyssop - As lepers, are by thy appointment purified by the use of hyssop and other things, so do thou cleanse me a leprous and polluted creature, by thy grace, and by that blood of Christ, which is signified by those ceremonial usages.