My father forbids me from fasting voluntary fasts in the summer because of thirst, so what is the ruling on that?

Question:
The questioner says: I fast the voluntary fasts, and praise and thanks be to Allah, but when I fast, my father tells me not to fast in the summer because it is hot and causes thirst. They say that it causes lung disease. I, praise be to Allah, can bear the thirst, so I tell them that, but they are not convinced. So what is the correct course of action?

Answer:
If the reason your parents forbid you from fasting is so that you can serve them and do their work, then there is no doubt that serving them and doing their work is better than voluntary fasting. However, if it is not out of necessity, but only out of concern for you, and you know from yourself that you are capable, then you fast and convince your parents that you are able to fast and that you want to do good. I do not think they will prevent you if you explain this to them, because their intention is concern for you. If you explain to them that you are able and that there is no harm to you, they will be convinced and will not deprive you of the reward. Yes.