O Allah, You are Pardoning, You love to pardon, so pardon me. (Du'a for Laylat a — Fasting
اللَّهُمَّ إِنَّكَ عَفُوٌّ تُحِبُّ الْعَفْوَ فَاعْفُ عَنِّي
Transliteration: Allaahumma innaka 'afuwwun tuhibbul-'afwa fa'fu 'annee
Translation: O Allah, You are Pardoning, You love to pardon, so pardon me. (Du'a for Laylat al-Qadr)
Reference: Tirmidhi 3513