اللَّهُمَّ اغْفِرْ لَهُ وَارْحَمْهُ وَأَدْخِلْهُ الْجَنَّةَ وَأَعِذْهُ مِنْ عَذَابِ الْقَبْرِ
Allahummaghfir lahu warhamhu wa adkhilhul-jannata wa a'idhhu min 'adhabil-qabr
O Allah, forgive him, have mercy on him, admit him to Paradise, and protect him from the punishment of the grave.
This concise du'a covers the essential requests for the deceased. The Prophet ﷺ said: "When a person dies, his deeds come to an end except for three: ongoing charity, beneficial knowledge, or a righteous child who prays for him" (Sahih Muslim 1631). Du'a for deceased parents is one of the greatest acts of birr (righteousness) a child can do.
Related Du'as
اللَّهُمَّ ثَبِّتْنِي عِنْدَ السُّؤَالِ، اللَّهُمَّ ثَبِّتْنِي بِالْقَوْلِ الثَّابِتِ فِي الْحَيَاةِ الدُّنْيَا وَفِي الْآخِرَةِ
O Allah, keep me firm at the time of questioning. O Allah, make me firm with the firm word in the life of this world and in the Hereafter.
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 اغْفِرْ لِحَيِّنَا وَمَيِّتِنَا وَصَغِيرِنَا وَكَبِيرِنَا وَذَكَرِنَا وَأُنْثَانَا وَشَاهِدِنَا وَغَائِبِنَا
O Allah, forgive our living and our dead, our young and our old, our males and our females, our present and our absent.
Sahihاللَّهُمَّ 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.
Hasan