ANSWER:

If he didn’t know the ruling, the prayer is valid

If anyone make a mistake in prayer that required prostrations of forgetfulness after Salam but he gives the prostrations of forgetfulness before salam – does it make his prayer invalid? & need to the repeat the prayer again?

Prayer | April 6, 2022 2:35 pm
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When We get up form 2nd sujood of 1st or 3rd rakkah we say takbeer and then sit for a while as Jalsa Al-Istiraahah. Then we get up for 2nd or 4th rakkah, so while standing up for 2nd or 4th rakkah after Jalsa Al-Istiraahah we have to say takbeer again or not?
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My masjid prays taraweeh really fast and prays witr like maghrib. Is my prayer valid if my Imam recites Fatiah very fast and unclear? Do I need to pray in different masjid?