The Book of Jumu'ah (Friday Prayer)
14/37. Chapter:
Number Of Rak'ahs In Jumu'ah Prayer
Sunan an-Nasai
أَخْبَرَنَا عَلِيُّ بْنُ حُجْرٍ، قَالَ حَدَّثَنَا شَرِيكٌ، عَنْ زُبَيْدٍ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبِي لَيْلَى، قَالَ قَالَ عُمَرُ صَلاَةُ الْجُمُعَةِ رَكْعَتَانِ وَصَلاَةُ الْفِطْرِ رَكْعَتَانِ وَصَلاَةُ الأَضْحَى رَكْعَتَانِ وَصَلاَةُ السَّفَرِ رَكْعَتَانِ تَمَامٌ غَيْرُ قَصْرٍ عَلَى لِسَانِ مُحَمَّدٍ صلى الله عليه وسلم . قَالَ أَبُو عَبْدِ الرَّحْمَنِ عَبْدُ الرَّحْمَنِ بْنُ أَبِي لَيْلَى لَمْ يَسْمَعْ مِنْ عُمَرَ .
It was narrated from 'Abdur-Rahman bin Abi Laila that 'Umar said: "Jumu'ah prayer is two rak'ahs, and the prayer of Al-Fitr is two rak'ahs, and the prayer of Al-Adha is two rak'ahs, and the prayer when traveling is two rak'ahs, complete and not shortened, on the tongue of Muhammad (ﷺ)."
Reference : Sunan an-Nasa'i 1420In-book reference : Book 14, Hadith 57English translation : Vol. 2, Book 14, Hadith 1421