What advice is given to one who was undutiful to his father when he was young?

Question:
I was ten years old when my father stood up to hit me over something, and he fell to the ground. I invoked a curse upon him and said, "May Allah cause you to stumble." He then drove me away and hit me. I am now thirty years old, and my father has passed away. Perhaps he is in a difficult state and is asking?

Answer:
You must repent to Allah. If you were in a state of childhood before reaching the age of accountability, there is no blame on you, if Allah wills. However, you should increase your supplication, seeking forgiveness, and asking for mercy for him. You should say, "O Allah, forgive him. O Allah, have mercy on him. O Allah, reward him for me with good." Praise be to Allah. At that time, you had no blame regarding the age of accountability, due to the saying of the Prophet (peace and blessings be upon him): . You were not accountable at that time. We ask Allah to pardon you, but you should supplicate for him frequently.