How should a righteous brother deal with his brother who works in riba (usury or interest) while they live in the same house?

The questioner : For example, if a man’s brother works in riba (usury or interest) and he is naturally living with him, he warns him about the matter, but he is not willing to stop. What should he do?

The Shaykh : Can this brother who is warning him live alone after he has fulfilled his duty of advising him? If he can, then he must separate and cut ties.

The questioner : He can.

The Shaykh : Then he must separate and cut ties.

The questioner : But he is upset about his brother, about his brother’s condition.

The Shaykh : He is not upset about his own condition. What can we do for him? He is not upset about his own condition.

The questioner : I mean.

The Shaykh : How?

The questioner : Is it not his sin, for example?

The Shaykh : I did not understand. Is it not his sin? What?

The questioner : He did not commit a sin, meaning?

The Shaykh : Who is the one who is warning?

The questioner: Yes.

The Shaykh : No, he did not commit a sin. He fulfilled his duty.

The questioner : So, what is the manner of the duty upon him, O Shaykh?

The Shaykh : Yes.

The questioner : The manner of the duty upon him.

The Shaykh : That he advises him.

The questioner : Does that mean for several times, or just once?

The Shaykh : No, for several times until he gives up hope of him.

The questioner : But not just once or twice.

The Shaykh: No, no.

The questioner : May Allah reward you with good.

The Shaykh : And beware of that.