Duas for Deceased

Prophetic Supplication

اللَّهُمَّ عَبْدُكَ وَابْنُ أَمَتِكَ احْتَاجَ إِلَى رَحْمَتِكَ، وَأَنْتَ غَنِيٌّ عَنْ عَذَابِهِ، إِنْ كَانَ مُحْسِنًا فَزِدْ فِي حَسَنَاتِهِ، وَإِنْ كَانَ مُسِيئًا فَتَجَاوَزْ عَنْهُ

Translation

O Allah, Your servant and the son of Your maidservant is in need of Your mercy and You are without need of his punishment. If he was a doer of good, then increase his good deeds...

رواه الحاكم