If one has a brother who does not pray, should he boycott him after advising him?

Question:
May Allah reward you with good, and may He do you good. The second case presented by Abu Lafi from the Eastern Region is that he has a wicked brother, or so he describes him; he does not persist in performing the prayers, he is undutiful to his father, he maintains family ties, and he tried to guide him, but he was unable to. He has given him some drinks and some books, but he did not benefit from them. He asks whether he should cut him off or continue advising him. May Allah reward you with good.

Answer:
We ask Allah for guidance for us and for him. There is no doubt that these are crimes and major sins committed by this person mentioned. He must repent to Allah (Glorified and Exalted is He) and seek His forgiveness before the time passes and repentance is cut off from him. As for you, O questioner, you are doing good, and may Allah reward you with good for your concern for your brother and your advising him. You must continue advising him, perhaps Allah will guide him, and you will have a reward for that. You are rewarded in any case: if he is guided, you have a great reward in that; and if he is not guided, you have fulfilled the obligation and cleared your conscience.
As for boycotting, there is a distinction here. If the boycotting affects him and it is hoped that he will repent because of it, then boycotting is prescribed in this case. But if the boycotting does not affect him, and perhaps it will only increase his persistence in sin, then do not boycott him, but continue with him the advice and the connection, perhaps Allah will guide him. Yes.