A man died because of a problem with his son; is the son required to pay an expiation?

Question: I am asking about an incident I went through a year and a half ago. I loved my father, but family circumstances arose between us. Despite the circumstances, I love him and he loves me, but the circumstances caused a continuous daily disagreement between my father and me. One day, my father fell ill and was hospitalized. After he was discharged, the doctor told my mother not to bring up any problems with him, as they affect his feelings and could cause him to die, because he cannot withstand any shock. Three months passed after his discharge, and my mother did not inform us of this. Then a problem occurred between me and him that upset him, and he suffered a shock that same day due to some other problems. He was then hospitalized and died.
Now I ask: Am I the cause of that? And what is required of me by the Shari'ah?

Answer: Nothing is required of you, because you did not intend to harm him, and you were not aware of the problems he was advised to avoid. So, if Allah wills, there is no blame on you. Problems always occur between people, and it is not possible to guard against them. In this regard, you are like other people; nothing is required of you, if Allah wills. Neither a ransom payment nor an expiation is required of you in this matter, because these are ordinary matters that occur between people, between a father and his son, between a brother and his brother, and between a man and his wife. So, if Allah wills, nothing is required in this.