Preaching to people in the graveyard after the burial
Question

                Some brothers give a speech when someone is buried, for the purpose of preaching to the mourners. What is the ruling on this?
Praise be to Allah.We put this question to Shaykh Muhammad ibn Saalih al-‘Uthaymeen,
    may Allaah preserve him, who replied:
“I think that this is an innovated bid’ah. No preacher can
    claim that he loves to preach to people more than the Messenger of Allaah 
 (peace and
    blessings of Allaah be upon him) did. It is not reported anywhere that the Messenger of
    Allaah 
 (peace and blessings of Allaah be upon him) used to stand up to address the people
    with a khutbah in the graveyard. All that is mentioned is that one day he came to a grave
    when the burial had not yet been completed. He sat down, and his companions sat down with
    him, and he started talking to them about what happens when a person is on his deathbed
    and after he dies. This is the nearest thing that has been reported, and anyone who stands
    up to preach to the people after a burial is doing so on the basis of incorrect ijtihaad.
Question:
But the fact that the Prophet 
 (peace and blessings of Allaah be upon
    him) did this once…?
Answer:
He did not preach as such. He just started talking to the people who
    were sitting with him. It was not intended as preaching and he did not stand up to deliver
    a khutbah.
Question:
So if a person sits by the grave and others sit with him, and he tells
    them the hadeeth of Abu Dawood (the hadeeth of al-Bara’), would this action be OK
    according to sharee’ah?
Answer:
It is not OK according to sharee’ah, because the Messenger of
    Allaah 
 (peace and blessings of Allaah be upon him) did not sit with the intention of
    preaching. He just sat down to wait until the burial was over. There is a difference
    between what happens by coincidence and what is done deliberately, and he never did this
    on any other occasion.
And Allaah knows best.