How a righteous child supplicates for his parents after their death

Question:
The first question in this episode is from Abdul Hadi Ali Bashiri from the Republic of Sudan. He says: I am addressing you, Honorable Shaykh, with a collection of questions, hoping for your answers. His first question says: The Messenger of Allah (peace and blessings be upon him) said: My question regarding this hadith is that it has branches or is composed of parts. If the son possesses righteousness and piety, and that is feasible for him, what are the supplications and seeking of forgiveness by which he seeks mercy for his parents? Is there a specific supplication or seeking of forgiveness reported from the Messenger of Allah (peace and blessings be upon him) that it is good for the righteous son to use when seeking mercy for his parents after their death?

Answer:
In the name of Allah, the Most Gracious, the Most Merciful. Praise be to Allah, Lord of the worlds, and may Allah send prayers and blessings upon our Prophet Muhammad, his family, and all his Companions. As for the hadith mentioned by the questioner, it is a valid hadith that indicates the cessation of a son of Adam’s deeds upon death.
Except for these three things: if he has a righteous son who supplicates for him. The text specifies “righteous” because that is closer to being answered. The Messenger of Allah (peace and blessings be upon him) did not specify the supplication. So he supplicates for his father with whatever types of supplications are easy for him, such as seeking forgiveness, mercy, pardon, and the like. He seeks forgiveness for him and increases his seeking of forgiveness for him. The Messenger of Allah (peace and blessings be upon him) did not specify a type of supplication. Yes.