Visiting the grave of the Prophet (peace and blessings be upon him) and how to greet him

Question:
He says: Regarding visiting the grave of the Prophet (peace and blessings be upon him) in al-Madinah al-Munawwarah, is it a recommended practice (sunnah) or obligatory? But I see some errors that some visitors follow in their method of greeting, as well as in the supplication at the grave of the Messenger (peace and blessings be upon him).

Answer:
Visiting the grave of the Prophet (peace and blessings be upon him) is a recommended practice (sunnah) to greet him. To greet him (peace and blessings be upon him). Likewise, visiting the graves of his two companions, Abu Bakr and 'Umar, who are buried with him. So you go and stand at the grave of the Prophet (peace and blessings be upon him) and say, "Peace be upon you, O Messenger of Allah, and the mercy of Allah and His blessings."
Then you move back a little to the east, you stand facing 'Umar, you say facing Abu Bakr al-Siddiq, "Peace be upon you, O Abu Bakr al-Siddiq, and the mercy of Allah and His blessings." Then you move back a little to the east and stand facing 'Umar (may Allah be pleased with him), you say, "Peace be upon you, O 'Umar ibn al-Khattab, and the mercy of Allah and His blessings." Then you leave.
And if you want to make supplication, you do not supplicate at the graves; you supplicate in the mosque of the Messenger (peace and blessings be upon him), away from the graves. Yes.