Deeds that benefit parents, whether living or deceased

Question:
What are the deeds that benefit and are of use to parents, whether living or deceased?

Answer:
The deeds that benefit and are of use to parents, whether living or deceased, are: while they are living, being dutiful to them, showing them excellence, serving them, fulfilling their needs, speaking to them gently, addressing them with kindness, and being gentle with them, serving them when they are in need. This is in this world.
And when they die, it is by making supplication for them, seeking forgiveness for them, carrying out their lawful bequests, and paying off the debts that are upon them or upon one of them from their estate. If they have no estate and one volunteers to pay off the debt on their behalf, this is part of being dutiful to them and showing them excellence.
Also part of showing them excellence is performing Hajj and 'Umrah on their behalf. One performs Hajj and 'Umrah on their behalf: if they did not perform the obligatory Hajj, one intends to perform the obligatory Hajj on their behalf; and if they did perform the obligatory Hajj, one intends it as a voluntary act and an addition of good for them. Yes.