Your prayer is valid as you didn’t know. Those who prayed from the beginning with him, their prayer is invalid if they knew that.

I joined imam in 2nd rakah in magrib salah. Imam offered sajda sahu & I also offered & I completed my salah by praying one rakah after lmam said the last tasleem. Later on people told me that imam had not recited fatihah in 1st rakah but only surah. Is my and other people’s prayer valid or we have to repeat it?

Prayer | November 16, 2015 4:18 am
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Sometimes when I pray I intentionally think about other things, does this make the salah invalid?
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what does a person do if he/she had a wet dream and couldn’t have a bath because of absence of water and later when he got water he forgot to take the bath and mean while leads in a prayer? Is the prayer valid?