This hadith his been narrated by 'Abu al-Malik with the same chain of transmitters.
Sahih Muslim Book 4, Hadith 179
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The people of Kufa complained to Umar b. Khattab about Sa'd and they made a mention of his prayer. 'Umar sent for him. He came to him. He ('Umar) told him that the people had found fault with his prayer. He said: I lead them in prayer in accorance with the prayer of the Messenger of Allah (ﷺ). I make no decrease in it. I make them stand for a longer time in the first two (rak'ahs) and shorten it in the last two. Upon this 'Umar remarked: This is what I deemed of thee, O Abu Ishaq.
Sahih Muslim Book 4, Hadith 178 Next Hadith → 'Umar said to Sa'd: They complain against you in every matter, even in prayer. He (Sa'd) said: I prolong (standing) in the first two (rak'ahs) and shorten it in the last two, and I make no negligence in following the prayer of the Messenger of Allah (ﷺ). He ('Umar) remarked: This is what is expected of you, or, that is what I deemed of you.
Sahih Muslim Book 4, Hadith 180
Sahih Muslim Book 4, Hadith 178 Next Hadith → 'Umar said to Sa'd: They complain against you in every matter, even in prayer. He (Sa'd) said: I prolong (standing) in the first two (rak'ahs) and shorten it in the last two, and I make no negligence in following the prayer of the Messenger of Allah (ﷺ). He ('Umar) remarked: This is what is expected of you, or, that is what I deemed of you.
Sahih Muslim Book 4, Hadith 180