ANSWER:

If this is voluntary prayers, this is valid and you will get only half of the rewards. 

But if this is fard prayers, your prayer is invalid as it is a pillar of the validity of prayers that you stand up when able to do so. 

QUESTION: Sometimes i pray my salah by sitting even though I don’t have any valid reason. Am i sinful shiekh? Is my salah valid sheikh?

Prayer | July 10, 2023 2:30 am
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QUESTION: The dua ” allahumma rabba jibreel wa mikail wa israfil” and some other duas that you mentioned in your video to open the night prayer with, should we say this duas between takbeer and surah fatiha? Or before takbeer? This is the 13 no video of your fortress of Muslim playlist. Also “inni wajjahtu” this dua to say after takbeer? Can we say multiple duas in ruku or we can Only say one dua 3 times?
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QUESTION: Will saying Allahu Akbar after saying “Subhana Rabbiyal Athem” make the salah invalid? If so, does that make all my past salah invalid, because I didn’t know but when I knew, I wasn’t sure whether to trust it or not so I still say Allahu Akbar? When I researched, I saw that it was still valid to say Allahu Akbar and my mother said to still say Allahu Akbar.