Abu Usayd said, "We were with the Messenger of Allah, may Allah bless him and grant him peace, when a man asked, 'Messenger of Allah, is there any act of dutifulness which I can do for my parents after their death?' He replied, 'Yes. There are four things: Supplication for them, asking forgiveness for them, fulfilling their pledges, and being generous to friends of theirs. You only have ties of kinship through your parents."  

أَنَّهُ سَمِعَ أَبَا أُسَيْدٍ يُحَدِّثُ الْقَوْمَ قَالَ كُنَّا عِنْدَ النَّبِيِّ ﷺ فَقَالَ رَجُلٌ يَا رَسُولَ اللهِ هَلْ بَقِيَ مِنْ بِرِّ أَبَوَيَّ شَيْءٌ بَعْدَ مَوْتِهِمَا أَبَرُّهُمَا؟ قَالَ نَعَمْ خِصَالٌ أَرْبَعٌ الدُّعَاءُ لَهُمَا وَالِاسْتِغْفَارُ لَهُمَا وَإِنْفَاذُ عَهْدِهِمَا وَإِكْرَامُ صَدِيقِهِمَا وَصِلَةُ الرَّحِمِ الَّتِي لاَ رَحِمَ لَكَ إِلاَّ مِنْ قِبَلِهِمَا  

Abu Hurayra said, "The dead person can be raised a degree after his death. He said, 'My Lord, how is this?' He was told, 'Your child can ask for forgiveness for you.'"  

تُرْفَعُ لِلْمَيِّتِ بَعْدَ مَوْتِهِ دَرَجَتُهُ فَيَقُولُ أَيْ رَبِّ أَيُّ شَيْءٍ هَذِهِ؟ فَيُقَالُ وَلَدُكَ اسْتَغْفَرَ لَكَ  

Ibn Sirin said, "We were with Abu Hurayra one night and he said, 'O Allah, forgive Abu Hurayra and his mother and whoever asks for forgiveness for both of them.'" Muhammad said, "We used to ask for forgiveness for them so that we would be included in Abu Hurayra's supplication."  

كُنَّا عِنْدَ أَبِي هُرَيْرَةَ لَيْلَةً فَقَالَ اللَّهُمَّ اغْفِرْ لأَبِي هُرَيْرَةَ وَلِأُمِّي وَلِمَنِ اسْتَغْفَرَ لَهُمَا قَالَ لِي مُحَمَّدٌ فَنَحْنُ نَسْتَغْفِرُ لَهُمَا حَتَّى نَدْخُلَ فِي دَعْوَةِ أَبِي هُرَيْرَةَ  

that the Messenger of Allah, may Allah bless him and grant him peace, said, "When a person dies, all action is cut off for him with the exception of three things: sadaqa which continues, knowledge which benefits, or a righteous child who makes supplication for him."  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ إِذَا مَاتَ الْعَبْدُ انْقَطَعَ عَنْهُ عَمَلُهُ إِلاَّ مِنْ ثَلاَثٍ صَدَقَةٍ جَارِيَةٍ أَوْ عِلْمٍ يُنْتَفَعُ بِهِ أَوْ وَلَدٍ صَالِحٍ يَدْعُو لَهُ  

Ibn 'Abbas reported that a man said, "Messenger of Allah, my mother died without a will. Will it help her if I give sadaqa on her behalf?" "Yes," he replied.  

أَنَّ رَجُلاً قَالَ يَا رَسُولَ اللهِ إِنَّ أُمِّي تُوُفِّيَتْ وَلَمْ تُوصِ أَفَيَنْفَعُهَا أَنْ أَتَصَدَّقَ عَنْهَا؟ قَالَ نَعَمْ