Chapter: Sahw in compulsory Salat and Nawafil

Hadith Number 1232

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Narrated Abu Huraira

Allah's Messenger (ﷺ) said, "When anyone of you stands for the prayers, Satan comes and puts him in doubts till he forgets how many rak`at he has prayed. So if this happens to anyone of you, he should perform two prostrations of Sahu while sitting.