اللَّهُمَّ إِنْ كَانَ مُحْسِنًا فَزِدْ فِي إِحْسَانِهِ وَإِنْ كَانَ مُسِيئًا فَتَجَاوَزْ عَنْ سَيِّئَاتِهِ
Allahumma in kana muhsinan fazid fi ihsanihi wa in kana musi'an fatajawaz 'an sayyi'atih
O Allah, if he was a doer of good, then increase his good deeds, and if he was a wrongdoer, then overlook his misdeeds.
A janazah du'a that covers both possibilities without judgment. You do not know the deceased's true state — only Allah does. If they were good, ask for more. If they were bad, ask for forgiveness. The beauty is in the humility: you do not declare them righteous or sinful. You present both scenarios and let Allah's knowledge and mercy determine the outcome.
Related Du'as
اللَّهُمَّ اغْفِرْ لَهُ وَارْفَعْ دَرَجَتَهُ فِي الْمَهْدِيِّينَ وَافْسَحْ لَهُ فِي قَبْرِهِ وَنَوِّرْ لَهُ فِيهِ
O Allah, forgive him, raise his rank among the guided, make his grave spacious, and illuminate it for him.
Sahihاللَّهُمَّ إِنَّهُ عَبْدُكَ وَابْنُ عَبْدِكَ وَابْنُ أَمَتِكَ، كَانَ يَشْهَدُ أَنْ لَا إِلَٰهَ إِلَّا أَنْتَ وَأَنَّ مُحَمَّدًا عَبْدُكَ وَرَسُولُكَ، وَأَنْتَ أَعْلَمُ بِهِ
O Allah, he is Your servant, son of Your male servant, son of Your female servant. He used to testify that there is no deity except You and that Muhammad is Your servant and messenger, and You know him best.
Hasanاللَّهُمَّ إِنِّي أَسْأَلُكَ حُسْنَ الْخَاتِمَةِ وَأَعُوذُ بِكَ مِنْ سُوءِ الْخَاتِمَةِ، اللَّهُمَّ اجْعَلْ خَيْرَ أَعْمَالِنَا خَوَاتِمَهَا وَخَيْرَ أَيَّامِنَا يَوْمَ نَلْقَاكَ
O Allah, I ask You for a good ending and I seek refuge in You from a bad ending. O Allah, make the best of our deeds their conclusions and the best of our days the day we meet You.
Hasanاللَّهُمَّ أَجِرْنِي مِنَ النَّارِ، اللَّهُمَّ أَجِرْنِي مِنَ النَّارِ، اللَّهُمَّ أَجِرْنِي مِنَ النَّارِ، اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنَ النَّارِ
O Allah, save me from the Fire. O Allah, save me from the Fire. O Allah, save me from the Fire. O Allah, I seek refuge in You from the Fire.
Sahih