The finest act of goodness is that a person should treat kindly the loved ones of his father.  

أَنَّ النَّبِيِّ ﷺ قَالَ أَبَرُّ الْبِرِّ أَنْ يَصِلَ الرَّجُلُ وُدَّ أَبِيهِ  

Arn't you so and so? He said: Yes He gave him his donkey and said: Ride it, and tie the turban round your head. Some of his companions said: May Allah pardon you, you gave to this desert Arab the donkey on which you enjoyed ride for diversion and the turban which you tied round your. head. Thereupon he said: Verily I heard Messenger of Allah ﷺ as saying: The finest act of goodness is the kind treatment of a person to the loved ones of his father after his death and the father of this person was a friend of 'Umar.  

أَنَّهُ كَانَ إِذَا خَرَجَ إِلَى مَكَّةَ كَانَ لَهُ حِمَارٌ يَتَرَوَّحُ عَلَيْهِ إِذَا مَلَّ رُكُوبَ الرَّاحِلَةِ وَعِمَامَةٌ يَشُدُّ بِهَا رَأْسَهُ فَبَيْنَا هُوَ يَوْمًا عَلَى ذَلِكَ الْحِمَارِ إِذْ مَرَّ بِهِ أَعْرَابِيٌّ فَقَالَ أَلَسْتَ ابْنَ فُلاَنِ بْنِ فُلاَنٍ قَالَ بَلَى فَأَعْطَاهُ الْحِمَارَ وَقَالَ ارْكَبْ هَذَا وَالْعِمَامَةَ قَالَ اشْدُدْ بِهَا رَأْسَكَ فَقَالَ لَهُ بَعْضُ أَصْحَابِهِ غَفَرَ اللَّهُ لَكَ أَعْطَيْتَ هَذَا الأَعْرَابِيَّ حِمَارًا كُنْتَ تَرَوَّحُ عَلَيْهِ وَعِمَامَةً كُنْتَ تَشُدُّ بِهَا رَأْسَكَ فَقَالَ إِنِّي سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ إِنَّ مِنْ أَبَرِّ الْبِرِّ صِلَةَ الرَّجُلِ أَهْلَ وُدِّ أَبِيهِ بَعْدَ أَنْ يُوَلِّيَ وَإِنَّ أَبَاهُ كَانَ صَدِيقًا لِعُمَرَ  

While we were with the Messenger of Allah! ﷺ a man of Banu Salmah came to Him and said: Messenger of Allah is there any kindness left that I can do to my parents after their death? He replied: Yes, you can invoke blessings on them, forgiveness for them, carry out their final instructions after their death, join ties of relationship which are dependent on them, and honour their friends.  

بَيْنَا نَحْنُ عِنْدَ رَسُولِ اللَّهِ ﷺ إِذَا جَاءَهُ رَجُلٌ مِنْ بَنِي سَلِمَةَ فَقَالَ يَا رَسُولَ اللَّهِ هَلْ بَقِيَ مِنْ بِرِّ أَبَوَىَّ شَىْءٌ أَبَرُّهُمَا بِهِ بَعْدَ مَوْتِهِمَا قَالَ نَعَمِ الصَّلاَةُ عَلَيْهِمَا وَالاِسْتِغْفَارُ لَهُمَا وَإِنْفَاذُ عَهْدِهِمَا مِنْ بَعْدِهِمَا وَصِلَةُ الرَّحِمِ الَّتِي لاَ تُوصَلُ إِلاَّ بِهِمَا وَإِكْرَامُ صَدِيقِهِمَا  

I did not feel jealous of any of the wives of the Prophet ﷺ as much as I did of Khadija though I did not see her, but the Prophet ﷺ used to mention her very often, and when ever he slaughtered a sheep, he would cut its parts and send them to the women friends of Khadija. When I sometimes said to him, "(You treat Khadija in such a way) as if there is no woman on earth except Khadija," he would say, "Khadija was such-and-such, and from her I had children."  

مَا غِرْتُ عَلَى أَحَدٍ مِنْ نِسَاءِ النَّبِيِّ ﷺ مَا غِرْتُ عَلَى خَدِيجَةَ وَمَا رَأَيْتُهَا وَلَكِنْ كَانَ النَّبِيُّ ﷺ يُكْثِرُ ذِكْرَهَا وَرُبَّمَا ذَبَحَ الشَّاةَ ثُمَّ يُقَطِّعُهَا أَعْضَاءً ثُمَّ يَبْعَثُهَا فِي صَدَائِقِ خَدِيجَةَ فَرُبَّمَا قُلْتُ لَهُ كَأَنَّهُ لَمْ يَكُنْ فِي الدُّنْيَا امْرَأَةٌ إِلاَّ خَدِيجَةُ فَيَقُولُ إِنَّهَا كَانَتْ وَكَانَتْ وَكَانَ لِي مِنْهَا وَلَدٌ