The Prophet (ﷺ) used to pray:

اَللَّهُمَّ طَهِّرْنِيْ مِنَ الذُّنُوبِ وَالْخَطَايَا اَللَّهُمَّ نَقِّنِيْ مِنْهَا كَمَا يُنَقَّى الثَّوْبُ الْأَبْيَضُ مِنَ الدَّنَسِ، اَللَّهُمَّ طَهِّرْنِيْ بِالثَّلْجِ وَالْبَرَدِ وَالْمَاءِ الْبَارِدِ

Allaahumma tahhirni minadh-dhunubi wal-khataayaa. Allaahumma naqqini minhaa kamaa yunaqqath thawbul-abyadu minad-danasi, Allaahumma tahhirni bith-thalji wal-barad wal-maa'i al-baarid

O Allah, purify me of sin and error, O Allah cleanse me of it as a white garment is cleansed of dirt, O Allah purify me with snow and hail and cold water.

Reference: Sahih. An-Nasa'i: 402