agar galti se tashahud ke baad salam padh de aur takbeer b to namaz baatil hogae ya continue kar sakte hai
takbeer kehte waqt yaad aagaya ke yeh last rakat nahi thi.

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ws,agar takbeer ke waqt yaad aa jae to fauran khada ho kar apni namaz aage padhega aur namaz tamam karne ke baad 2 sajde sahw anjam dega