O Allah, separate me from my sins as You have separated the East from the West. O Allah, cleanse me ...
Reference:Al-Bukhari 1/181, Muslim 1/419.Hisnul Muslim 27
اللّهُـمَّ باعِـدْ بَيـني وَبَيْنَ خَطـايايَ كَما باعَدْتَ بَيْنَ المَشْرِقِ وَالمَغْرِبْ اللّهُـمَّ نَقِّنـي مِنْ خَطايايَ كَمـا يُـنَقَّى الثَّـوْبُ الأَبْيَضُ مِنَ الدَّنَسْ اللّهُـمَّ اغْسِلْنـي مِنْ خَطايـايَ بِالثَّلـجِ وَالمـاءِ وَالْبَرَدْ.
Allāhumma bā'id baynī wa bayna khatāyāyakamā bāa'adta bayn al-mashriqi wal-maghribi. Allāhumma naqqinī min khatāyāyakamā yunaqqa 'th-thawbu 'l-'abyaḍu min ad-danasi. Allāhumma 'ghsilnī min khatāyāya. bi 'th-thalji wal-mā'i wal-barad.
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.