Joel 3:21

For I will cleanse her blood that I have not cleansed -The word rendered “cleansed” is not used of natural cleansing, nor is the image taken from the cleansing of the body. The word signifies only to pronounce innocent, or to free from guilt. Nor is “blood” used of sinfulness generally, but only of the actual guilt of shedding blood. The whole then cannot be an image taken from the cleansing of physical defilement, like the words in the prophet Ezekiel, “then washed I thee with water; yea, I thoroughly washed away thy blood from thee”Ezekiel 16:9. Nor again can it mean the forgiveness of sins generally, but only the pronouncing innocent the blood which had been shed.