What should a young man do whose father severely beat him for buying a guitar, causing him serious injuries, and his father refused to pay for his treatment or allow him to return home?

Using a guitar is impermissible because it is among the forbidden musical instruments. The father's breaking of the guitar is correct, but striking the son to the point of injury is a greater error. Change should begin with admonition, then a gradual progression in forbidding, and the instrument should be broken without causing injury. Discipline through striking must be within limits, without causing damage or harm. Otherwise, the father is obligated to compensate for the damage he caused and to treat his son. It is not permissible for the son to reciprocate his father's action, due to the great right of the parent.