Abdullah bin Buhainah Al-Asdi the ally of Banu Abdul-Muttalib narrated:
"The Prophet (S) stood for the Zuhr prayer, and he had a sitting to perform, so when he completed his Salat, he performed two prostrations, saying the Takbir for each prostration. So he was sitting before saying the Salam, and the people prostrated with him in place of the sitting he forgot."
Reference: Jami` at-Tirmidhi 391 In-book : Book 2, Hadith 243 English translation : Vol. 1, Book 2, Hadith 391
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