You have to offer the prostration of forgetfulness before Salam. However, if you did not offer it, the salah is valid.

I have a question which is that someone forgets to say rabanna wa laka alhamd when rising from sujud, how would you make up for that after you finished your salah?

Prayer | June 30, 2017 4:41 am
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Can we say Bismillahi rahman rahim in Tashahud, before we recite the Attayat or we just recite Attayat without saying Bismillah?
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Someone told me if I’m late for example zuhr jamma prayer , if anyone is prayer volunteer prayer after zuhr I can join him to have jamma prayer is this correct sheikh