The ruling on praying while sitting for one who is able to stand for the duration of al-Fatihah

Question:
Salih from al-Ta'if, please, Salih. Peace be upon you, Abu Shaykh. And upon you be peace. Shaykh, my question is: some time ago I was examined and I developed varicose veins in my leg, in the shin. The doctor told me not to stand for long, meaning not to stand for the duration of the prayer, not to stand for a long time or anything like that, meaning I have to sit. So I prayed sitting on a chair, and my leg is fine, meaning I can stand up and sit down, and I have no difficulty. I was ashamed before Allah, and now I pray. Is there a sin on me or not, O Shaykh? Good, answer the Shaykh.

Answer:
If you are able to stand, even for the duration of reciting al-Fatihah, then it is obligatory for you to do so, because it is a pillar of the prayer. As for if you are unable to stand at all, then you pray sitting, based on the saying of the Messenger of Allah (peace and blessings be upon him) This is according to one's ability. But if you are able to stand, even for the duration of reciting al-Fatihah, then it is obligatory for you. Yes. Good, the question comes. Regarding the ability, I am able, O Shaykh, or is it just health? But the doctor advised me to do this. I say: stand, stand, may Allah bless you. As long as you are able to stand, you stand. This is in the obligatory prayer; it is a pillar of the prayer. Yes.