The ruling on saying: "O wicked one" to someone who is not

Question:
May Allah reward you, Honorable Shaykh. This questioner says: If I say to a person, "O wicked one," or "O thief," or "O oppressor," and he is not such, have I judged him by other than what Allah has revealed? And consequently, is that shirk (associating partners with Allah), or is it slander and a sin?

Answer:
You have judged yourself with what is not upon you. If you say to a Muslim, "O wicked one," or "O enemy of Allah," or "O open sinner," or "O disbeliever," and he is not such, this returns upon you. The sin of this returns upon you, as came in the authentic hadith. So let the Muslim guard his tongue from speaking such words to any of the Muslims. Yes.

The presenter:
May Allah reward you