The ruling on reducing contact with a stubborn father who is in disobedience

Question:
This questioner says: Honorable Shaykh, may Allah grant you success. My father deals with riba (usury or interest) banks and asks me to collect the interest from the bank for him every few months. When I spoke to him gently and kindly, he swore by Allah that this transaction contains a doubt, then he exploded in anger and asked me to avoid him, saying that this makes him happy. His question is: Is it permissible for me to reduce my contact with my father because he does not like me to remind him of this issue? And is that considered a lack of respect on my part toward him? In addition, he is a frequent backbiter, envious, and curses the creation of Allah. What is your advice to me and to my father in this matter?

Answer:
You have just spoken ill of your father with these descriptions. It was not befitting for you to mention these descriptions about your father. If he orders you to do something that involves disobedience, do not obey him, but be gentle with him in speech so that he may be persuaded to leave what is not permissible. If he does not comply and does not stop, and continues in what is not permissible in words or actions, then cut off contact with him, as Ibrahim (peace be upon him) said: . Yes.