The ruling on saying: “O Allah, send blessings upon You, O Messenger of Allah”

Question:
Honorable Shaykh, may Allah grant you success. He says: If I say, “O Allah, send blessings upon You, O Messenger of Allah,” one of the brothers objected to me and said, “Do not say ‘O Messenger of Allah.’” Is this objection correct?

Answer:
It appears to me that it is correct. There is no harm in saying, “O Allah, send blessings and peace upon You, O Messenger of Allah,” or “May Allah send blessings upon You, O Messenger of Allah.” There is no harm in this, because this is a way of bringing to mind the Prophet (peace and blessings be upon him). It is like the address in the tashahhud: “Peace be upon you, O Prophet, and the mercy of Allah.” This is an address to the Prophet, but it is a form of dialogue, not a direct call to him.