Sahih Muslim , Book 6, Hadith 15 (In-Book) ⓘ

Jubair b. Nufair reported: 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 doing.

حَدَّثَنَا زُهَيْرُ بْنُ حَرْبٍ، وَمُحَمَّدُ بْنُ بَشَّارٍ، جَمِيعًا عَنِ ابْنِ مَهْدِيٍّ، - قَالَ زُهَيْرٌ حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ، - حَدَّثَنَا شُعْبَةُ، عَنْ يَزِيدَ بْنِ خُمَيْرٍ، عَنْ حَبِيبِ بْنِ عُبَيْدٍ، عَنْ جُبَيْرِ بْنِ نُفَيْرٍ، قَالَ خَرَجْتُ مَعَ شُرَحْبِيلَ بْنِ السِّمْطِ إِلَى قَرْيَةٍ عَلَى رَأْسِ سَبْعَةَ عَشَرَ أَوْ ثَمَانِيَةَ عَشَرَ مِيلاً فَصَلَّى رَكْعَتَيْنِ ‏.‏ فَقُلْتُ لَهُ فَقَالَ رَأَيْتُ عُمَرَ صَلَّى بِذِي الْحُلَيْفَةِ رَكْعَتَيْنِ فَقُلْتُ لَهُ فَقَالَ إِنَّمَا أَفْعَلُ كَمَا رَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَفْعَلُ ‏.‏