In The Name of Allaah, The Most Merciful, The Bestower of Mercy.
Question: The questioner asks: What are the best deeds a person can do in order to please Allaah (The Most High) and (also) benefit one’s parents who have passed away?
Answer: Supplicating for your two parents is one of the best of deeds that will benefit them after they have passed away; fulfilling their promises (or contracts) after they have passed away; keeping the ties of kinship which cannot be done except through them and showing respect and kindness to their friends. It has been reported in a hadeeth on the authority of Abu Usaid Maalik Bin Rabee’ah As-Saa’idee (radiyallaahu-anhu) who said: One day whilst we were with the Messenger (sallal-laahu-alayhi-wasallam) a man from Banu Salamah came and said: O Messenger of Allaah! Is there anything left by way of honouring and showing kindness towards my parents after their death? He (sallal-laahu-alayhi-wasallam) said: Supplicating for them; seeking Allaah’s forgiveness for them; fulfilling their promises (or contracts which they may have left behind) after their death; showing respect and kindness towards their friends and keeping the ties of kinship which cannot be done except through them (i.e. their relatives). [Reported by Abu Dawud, Ahmad and Ibn Maajah] [Source: Fadaa’il Al-A’maal pages 28-29’ by Shaikh Muhmammad Bin Abdillaah As-Subayyil (rahimahullaah)]