Is it permissible to say "Sayyidina Muhammad" given his statement (peace and blessings be upon him): "I am the master of the children of Adam, and there is no boasting in that"?

Question:
He says: It is reported that the Prophet (peace and blessings be upon him) said: The students of knowledge prohibit saying "Sayyidina Muhammad" and reject this phrase, which causes resentment among his Muslim brothers toward him.

Answer:
The Messenger (peace and blessings be upon him) is undoubtedly the master of the children of Adam; this is established in the authentic narrations from him (peace and blessings be upon him). However, in contexts where the title "master" is not mentioned, it should not be used. For example, in the tashahhud, you do not say "O Allah, send blessings and peace upon our master" in the tashahhud of the prayer; this is not what was transmitted. Say: "O Allah, send blessings upon Muhammad and upon the family of Muhammad. Peace be upon you, O Prophet, and the mercy of Allah and His blessings." Similarly, in the tashahhud of the khutbah, such as the Friday sermon, it is not transmitted that one says "O Allah, send blessings and peace upon our master"; this is not what was transmitted. Say: "O Allah, send blessings and peace upon Muhammad." And in the Qur'an, it does not say "pray and send peace upon your master." So in contexts where the title "master" is not transmitted, it is not used. As for other contexts, "Sayyidina" is said, and he is undoubtedly our Sayyid (peace and blessings be upon him). In the adhan, you do not say "I bear witness that our master Muhammad is the Messenger of Allah"; this is an innovation, an addition to the adhan.