The ruling on addressing the Messenger as "O first of Allah's creation"

Question:
Regarding the vocative particle "ya" in "O first of Allah's creation," is it permissible to address the Messenger this way?

Answer:
It is not permissible to address him in supplication. However, if one says, "O Messenger of Allah, upon you be peace and blessings," or "O Prophet of Allah, upon you be peace and blessings," this causes no harm. But if one says, "O Messenger of Allah, give me such and such," or "Heal my sick person," or "O first of Allah's creation, I am under your protection," or "O first of Allah's creation," or "O Messenger of Allah, bring back my lost one," or "Inform me about such and such from the matters of the unseen," or the like, this is not permissible. This is shirk (associating partners with Allah). As for saying, "Upon you be peace and blessings, O Messenger of Allah," or "O Messenger of Allah, upon you be peace and blessings," this means bringing him to mind in the heart for the sake of sending peace and blessings upon him, just as one says in the prayer, "Peace be upon you, O Prophet, and the mercy of Allah and His blessings." This is a matter of bringing him to mind, not a matter of supplication. May Allah bless you.