Someone told him that it was not obligatory to wash the arms in wudu; what is the ruling on the prayers he offered previously?

Is Wudu Valid If Something Prevents Water from Reaching Your Feet?

She has a disability and is unable to do wudoo’, and her children refuse to help her to do wudoo’

Is Washing Arms from Wrists to Elbows Enough in Wudu?

Cleaning oneself with toilet paper to remove madhiy; is it necessary to clean oneself (istinja’) with water first in order for wudu to be valid?

Wiping the head when there is henna on the hair or a bag over the henna

Is wudu valid if the limb is only wiped with water?

Is it essential to move one’s ring when doing wudoo’ and ghusl?

Ruling on making water reach the throat when rinsing the mouth

Is it mustahabb for the woman to do wudoo’ before having intercourse a second time, as it is the man?