question #2 Sahih Muslim 476c, Book 4, Hadith 231 : How does the metaphor of cleansing with snow, hail, and cold water relate to purification from sins?

O Allah! our Lord, unto Thee be praise that would fill the heavens and the earth and fill that which will please Thee besides (them). O Allah! purify me with snow, (water of) hail and with cold water; O Allah. cleanse me from the sins and errors just as a white garment is cleansed from dirt.