The ruling on calling someone "my master" or "my lord"

Question:
Some people use the names "my lord" or "my master so-and-so." What is the ruling on this naming? And to whom is it permissible to say "my lord so-and-so" or "my master so-and-so"?

Answer:
This naming is not appropriate, neither "my lord" nor "my master." It should not be used; because it was reported from him (peace and blessings be upon him) that he said: This is only said regarding the master of his slave and his property, as in the authentic hadith: , The slave says to his owner: "My master, my lord"; there is no harm in that. But if a person says to his brother: "O my lord" or "O my master," he should leave that. When a man said to the Prophet (peace and blessings be upon him): "You are our master," he said: He feared that they would exaggerate regarding him (peace and blessings be upon him), so he said: Even though he is the master of the children of Adam (peace and blessings be upon him), but he feared that they would fall into exaggeration due to this address.
So you should not say: "O my master so-and-so," or "You are our master" to Zayd or 'Amr. No, you say: "O Abu so-and-so," "O so-and-so," you call him by his name, or by his kunyah, or by one of the well-known names by which people are known, but it does not include "my master" or "my lord." This is what the believer should do in terms of proper conduct with what the Messenger (peace and blessings be upon him) explained, and adhering to the Shari'ah etiquettes in words and all actions. Yes.

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