"The Prophet (S) turned (finished the prayer) after two (Rak'ah), so Dhul-Yadain said: 'Has the prayer been shortened or have you forgotten O Messenger of Allah?" The Prophet (S) said: 'Is what Dhul-Yadain said the truth?' The people said yes, so Allah's Messenger (S) stood to perform the last two (Rakah) of Salat, then he said the Taslim. Then he said the Takbir and prostrated in a manner the same or longer than his (normal) prostrations."
Reference: Jami` at-Tirmidhi 399 In-book : Book 2, Hadith 252 English translation : Vol. 1, Book 2, Hadith 399
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