Dua after Takbeer in Salah

اَللَّهُمَّ بَاعِدْ بَيْنِيْ وَبَيْنَ خَطَايَايَ كَمَا بَاعَدْتَ بَيْنَ الْمَشْرِقِ وَالْمَغْرِبِ، اَللَّهُمَّ نَقِّنِيْ مِنَ الْخَطَايَا كَمَا يُنَقَّى الثَّوْبُ الْأَبْيَضُ مِنَ الدَّنَسِ، اَللَّهُمَّ اغْسِلْ خَطَايَايَ بِالْمَاءِ وَالثَّلْجِ وَالْبَرَدِ

Transliteration

Allaahumma baa'id baynee wa bayna khataayaaya kamaa baa'adta baynal-mashriqi walmaghrib, Allaahumma naqqinee minal khataayaa kamaa yunaqqath-thawbul-'abyadhu minad-danas, Allaahummaghsil khataayaaya, bil maa'i wath-thalji wal-barad

Meaning

O Allah! separate me from my sins as You have separated the East from the West. O Allah, cleanse me of my transgressions as the white garment is cleansed of stains. O Allah! wash away my sins with ice and water and frost.

Source: Bukhari: 744