Is it permissible to obey my father’s order to buy him tobacco?

Question 20: Is it permissible to buy tobacco for my father as he asks me to do so?

Answer: It is not permissible to buy anything prohibited for the sake of your father whether it is tobacco, opium, hashish, alcohol or the like even if he asks you to do so. It was authentically reported that the Prophet (peace be upon him) said… read more here.