What is the ruling on one who catches Ramadan while he is ill, and the doctor tells him that fasting will not affect him? Does he fast or break his fast?

Question:
Regarding one who finds the month of Ramadan upon him while he is ill in bed, and he consulted the doctor about the issue of fasting, and the doctor said that fasting will not affect him, nor will it delay his recovery, by the permission of Allah. So what is your guidance, Shaykh Faisal? Does he adhere to the doctor's words, or does he fast? Or do you advise him to break his fast? May Allah reward you with good.

Answer:
In the name of Allah, the Most Gracious, the Most Merciful. Praise be to Allah, Lord of the worlds, and may Allah send prayers and blessings upon our Prophet Muhammad, and upon his family and all his Companions. And to proceed: Allah the Exalted says: the number of days, so that you may magnify Allah for what He has shown you, and perhaps you will be grateful. The illness that necessitates breaking the fast during the day of Ramadan is the illness that makes fasting difficult for the Muslim with an apparent hardship, or delays the recovery, or aggravates the illness. As long as the doctor has informed you that fasting does not lead to [harm] and has no complications for the illness, it is obligatory for you to fast, because this is not an illness that necessitates breaking the fast. As long as it does not affect you, does not aggravate your illness, does not delay your recovery, and does not cause you severe hardship, it is obligatory for you to fast in this case. Yes. May Allah reward you with good, and may He do you good.