The ruling on saying "O open sinner" or "O disbeliever" to one who is protected from such accusations

Question:
He asks: Is it permissible to say to a person who is committing sins and abandoning the prayer, "O open sinner" or "O disbeliever" or "O enemy of Allah"? And what is obligatory for me if I advise him and he does not accept?

Answer:
Do not say "O open sinner" or "O enemy of Allah," because this encourages evil; this encourages evil. But you must offer advice with gentleness, compassion, and wisdom. If he delays in accepting it, you should admonish him, admonish him, and make him fear Allah. If he becomes argumentative and wants to justify himself, then you should treat him with the best manner. These are the steps to which our Lord (Glorified and Exalted is He) guided us in His saying: .
As for saying "O open sinner," "O disbeliever," or "O servant of Allah," this is not permissible, because it increases the evil and leads the person to persist in what he is doing. Yes.