I went along with Shurahbil b. al-Simt to a village which was situated at a distance of seventeen or eighteen miles, and he said only two rak'ahs of prayer. I said to him (about it) and he said: I saw 'Umar observing two rak'ahs at Dhu'l-Hulaifa and I (too) said to him (about it) and he said: I am doing the same as I saw the Messenger of Allah (ﷺ) doing.
Reference: Sahih Muslim 692 a In-book : Book 6, Hadith 15 USC-MSA web (English) : Book 4, Hadith 1472 (deprecated)
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