اَللَّهُمَّ رَبَّنَا لَكَ الْحَمْدُ مِلْءَ السَّمَوَاتِ وَمِلْءَ الأَرْضِ وَمِلْءَ مَا شِئْتَ مِنْ شَىْءٍ بَعْدُ، اَللَّهُمَّ طَهِّرْنِي بِالثَّلْجِ وَالْبَرَدِ وَالْمَاءِ الْبَارِدِ اَللَّهُمَّ طَهِّرْنِي مِنَ الذُّنُوبِ وَالْخَطَايَا كَمَا يُنَقَّى الثَّوْبُ الأَبْيَضُ مِنَ الْوَسَخِ

Allaahumma, rabbanaa lakal ‘hamdu, mil-as samawaati wa mil-al ardi wa mil-aa maa shi’ta min shayin ba’du, Allaahumma tah-hirni bith-thalji wal baaradi wal ma-il baarad, Allaahumma tah-hirni minadh dhunubi wal khataaya kamaa yunakkath thawbul abyadu minal wasakh.

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.

Reference: Muslim: 476