What is the prescribed supplication when entering the Prophet's Mosque, and how does one greet the Prophet (peace and blessings be upon him) and his two companions?

Question:
May Allah reward you with good. This person is asking, Honorable Shaykh, and he says: What is the reported supplication when I enter the Prophet's Mosque, and how does one greet the Messenger (peace and blessings be upon him) and his two companions?

Answer:
The supplication when entering the Prophet's Mosque is the same as when entering other mosques: "In the name of Allah, I seek refuge in Allah the Great, in His noble face, and in His eternal authority from the rejected Satan. O Allah, send blessings upon Muhammad. O Allah, forgive my sins and open for me the gates of Your mercy." As for greeting the Prophet (peace and blessings be upon him), one goes and stands facing the Prophet (peace and blessings be upon him) and says: "Peace be upon you, O Messenger of Allah, and Allah's mercy and blessings." If he adds: "I bear witness that you conveyed the message, fulfilled the trust, and advised the Ummah, so may Allah reward you for Islam and the Muslims with good," then that is a good thing.
Then he moves back slightly toward the east and stands facing Abu Bakr al-Siddiq (may Allah be pleased with him) and says: "Peace be upon you, O Abu Bakr al-Siddiq, and Allah's mercy and blessings." Then he moves back slightly toward the east and stands facing 'Umar (may Allah be pleased with him) and says: "Peace be upon you, O 'Umar ibn al-Khattab, and Allah's mercy and blessings." Then he departs. Yes.