Du'a for Laylat al-Qadr: acceptance of deeds and forgiveness of shortcomings

اللَّهُمَّ مَا كَانَ فِيهَا مِنْ ذِكْرٍ وَشُكْرٍ فَتَقَبَّلْهُ مِنِّي وَأَحْسِنْ قَبُولَهُ، وَمَا كَانَ مِنْ تَفْرِيطٍ وَتَقْصِيرٍ وَتَضْيِيعٍ فَتَجَاوَزْ عَنِّي بِسَعَةِ رَحْمَتِكَ يَا أَرْحَمَ الرَّاحِمِينَ، اللَّهُمَّ تَغَمَّدْنِي فِيهَا بِسَابِغِ كَرَمِكَ، وَاجْعَلْنِي فِيهَا مِنْ أَوْلِيَائِكَ، وَاجْعَلْهَا لِي خَيْرًا مِنْ أَلْفِ شَهْرٍ مَعَ عَظِيمِ الْأَجْرِ وَكَرِيمِ الذُّخْرِ، اللَّهُمَّ لَا تَصْرِفْنِي مِنْ هَذِهِ اللَّيْلَةِ إِلَّا بِذَنْبٍ مَغْفُورٍ، وَسَعْيٍ مَشْكُورٍ، وَعَمَلٍ مُتَقَبَّلٍ مَبْرُورٍ، وَتِجَارَةٍ لَنْ تَبُورَ، وَشِفَاءٍ لِمَا فِي الصُّدُورِ، وَتَوْبَةٍ خَالِصَةٍ لِوَجْهِكَ الْكَرِيمِ

Allāhumma mā kāna fīhā min dhikrin wa shukrin fataqabbalhu minnī wa aḥsin qabūlahu, wa mā kāna min tafrīṭin wa taqṣīrin wa taḍyī'in fatajāwaz 'annī bisa'ati raḥmatika yā arḥama ar-rāḥimīna, Allāhumma taghammadnī fīhā bisābighi karamika, waj'alnī fīhā min awliyā'ika, waj'alhā lī khayran min alfi shahrin ma'a 'aẓīmi al-ajri wa karīmi adh-dhukhri, Allāhumma lā taṣrifnī min hādhihi al-laylati illā bidhanbin maghfūrin, wa sa'yin mashkūrin, wa 'amalin mutaqabbalin mabrūrin, wa tijāratin lan tabūra, wa shifā'in limā fiṣ-ṣudūri, wa tawbatin khāliṣatin liwajhika al-karīm

O Allah, whatever remembrance and gratitude there was in it, accept it from me and perfect its acceptance; and whatever negligence, shortcoming, and wasting of time there was, overlook it from me by the vastness of Your mercy, O Most Merciful of the merciful. O Allah, envelop me in it with Your abundant generosity, make me in it among Your close friends, and make it for me better than a thousand months with immense reward and noble treasure. O Allah, do not let me leave this night except with a forgiven sin, an appreciated effort, an accepted and blessed deed, a trade that will never perish, a healing for what is in the hearts, and a sincere repentance for Your noble countenance.

A general supplication, not a narration from the Prophet (peace be upon him). Part of a night-prayer supplication on Laylat al-Qadr.