Making sermons in graveyards a custom is a religious innovation

Question:
Is it permissible for a person to stand in the graveyard after the burial of the deceased and deliver a lecture, such as giving advice and reminding his brothers? And did this come from the Prophet (peace and blessings be upon him)?

Answer:
The Shaykh : This did not come from the Messenger (peace and blessings be upon him) except once, because the grave was not yet fully prepared, so he (peace and blessings be upon him) sat down and his Companions sat around him, and he gave them advice. He did not make this a regular practice. Therefore, whoever makes it a constant custom is mistaken. Yes. Whoever wants to preach to the people, the mosques are open, and praise be to Allah; he can preach to the people, teach them, and educate them, and he does not need to do so in the graveyards. Yes.