The ruling on praying for the deceased when visiting his grave

He has a third question in which he says: Is it permissible for me to pray the funeral prayer over my father's grave when I visit it, seeking mercy? And if the deceased left behind a mushaf, will his children receive reward for reciting from it?
Answer: If you have already prayed over your father with the people, there is no need to repeat the prayer. Visit him and simply make du'a for him. Go to the cemetery, greet the people in the graves, make du'a for them, and make du'a for your father, as the Prophet (peace and blessings be upon him) said: The Prophet (peace and blessings be upon him) taught his Companions that when they visited the graves, they should say: This is the Sunnah. So, greet the people in the graves, and greet your father, and make du'a for him for forgiveness and mercy. There is no need for the prayer, provided that you have already prayed over him. However, if you did not pray over him with the people, then you go to the grave and pray over him within a period of one month or less. If it has been a month or less, you pray over him. But if the period has been longer, there is no prayer according to a group of scholars, and du'a is sufficient. Making du'a for your father, seeking forgiveness for him, sending blessings upon him, and giving charity on his behalf with money—all of this benefits the deceased, whether it is a father or anyone else.
As for the mushaf, if the deceased left it behind, it benefits him. If he made it a waqf (endowment), its reward benefits him, just as if he endowed books of knowledge—books of beneficial knowledge, such as knowledge of the Shari'ah or permissible knowledge—and people benefited from them, he would be rewarded for that, because he helped them toward good. It is like if he endowed a piece of land, a house, or a shop, and he gave its produce in charity to the poor, or it was used to maintain mosques. All of this brings him reward. And he (peace and blessings be upon him) said in the authentic hadith: So, ongoing charities benefit the deceased if he is a Muslim. Ongoing charities benefit him. The du'a of his children and the du'a of others benefit him. The waqf he establishes after his death, whether it is a house, land, shop, palm trees, or the like, benefits him if people benefit from this waqf by eating from its produce or benefiting from its produce, or if its produce is spent on the mosques of the Muslims in their repair, their furnishings, their lighting, and so on. Yes.
The presenter: May Allah reward you with good.