I used to pronounce the words of prayers in the way I had learned from my parents and in secondary school. After a while, I found out that I had been pronouncing some words in a wrong manner. Is it obligatory for me — according to the fatwā of Imam Khomeini (q.) — to repeat the prayers? Or are all prayers that I performed in that way correct?
If a house, car or other necessities bought for personal use — not for the sake of business or making money with the money whose khums was paid are — later sold for some reason, is the increase in the market value subject to khums?