It was narrated that Ibn Abi Awfa said:
The Prophet (ﷺ) used to say: 'Allahumma tahhirni bith-thalji wal-barad wal-ma' al-barid, Allahumma tahhirni min adh-dhunub kama yutahhar ath-thawb al-abyad min ad-danas (O Allah, purify me with snow and hail and cold water, O Allah, purify me of sin as a white garment is cleansed of dirt).