عَنْ عَائِشَةَ، أَنَّهَا قَالَتْ يَا رَسُولَ اللّٰهِ صلّى الله عليه وسلّم أَرَأَيْتَ إِنْ وَافَقْتُ لَيْلَةَ الْقَدْرِ مَا أَدْعُو قَالَ تَقُولِينَ اللَّهُمَّ إِنَّكَ عَفُوٌّ تُحِبُّ الْعَفْوَ فَاعْفُ عَنِّي
Hazrat Aishara narrated that she asked, Allah’s Messengersa, “What do you think I should say in my supplication if I experience the Night of Destiny [Lailat-ul-Qadr]?” He replied, “Say, ‘Allahumma innaka ‘afuwwun tuhibbu l-‘afwa, fa‘fu ‘anni [O Allah, You are Most Forgiving and love forgiveness, so forgive me].’”
(Sunan Ibn Majah, Kitab ad-du‘a)