"I traveled with the Prophet, Abu Bakr, Umar, and Uthman; they would pray Zuhr and Asr as two Rak'ah and two Rak'ah, not praying before them nor after them." And Ibn Umar said: "If I was going to pray before it or after it then I would pray it complete."  

سَافَرْتُ مَعَ النَّبِيِّ ﷺ وَأَبِي بَكْرٍ وَعُمَرَ وَعُثْمَانَ فَكَانُوا يُصَلُّونَ الظُّهْرَ وَالْعَصْرَ رَكْعَتَيْنِ رَكْعَتَيْنِ لاَ يُصَلُّونَ قَبْلَهَا وَلاَ بَعْدَهَا وَقَالَ عَبْدُ اللَّهِ لَوْ كُنْتُ مُصَلِّيًا قَبْلَهَا أَوْ بَعْدَهَا لأَتْمَمْتُهَا قَالَ وَفِي الْبَابِ عَنْ عُمَرَ وَعَلِيٍّ وَابْنِ عَبَّاسٍ وَأَنَسٍ وَعِمْرَانَ بْنِ حُصَيْنٍ وَعَائِشَةَ  

"Imran bin Husain was asked about the traveler's prayer. He said: 'I performed Hajj with the Messenger of Allah, and he prayed two Rak'ah. I performed Hajj with Abu Bakr, and he prayed two Rak'ah and with Umar, and he prayed two Rak;ah; and with Uthman for six years of his Khilafah, or eight years, and he prayed two Rak'ah."  

حَجَجْتُ مَعَ رَسُولِ اللَّهِ ﷺ فَصَلَّى رَكْعَتَيْنِ وَحَجَجْتُ مَعَ أَبِي بَكْرٍ فَصَلَّى رَكْعَتَيْنِ وَمَعَ عُمَرَ فَصَلَّى رَكْعَتَيْنِ وَمَعَ عُثْمَانَ سِتَّ سِنِينَ مِنْ خِلاَفَتِهِ أَوْ ثَمَانِيَ سِنِينَ فَصَلَّى رَكْعَتَيْنِ  

"We prayed Zuhr as four with the Prophet in Al-Madinah, and Asr as two Rak'ah in Dhil-Hulaifah."  

صَلَّيْنَا مَعَ النَّبِيِّ ﷺ الظُّهْرَ بِالْمَدِينَةِ أَرْبَعًا وَبِذِي الْحُلَيْفَةِ الْعَصْرَ رَكْعَتَيْنِ  

"The Prophet went from Al-Madinah to Makkah, not fearing anyone except Allah the Lord of the worlds, and he prayed two Rak'ah."  

أَنَّ النَّبِيَّ ﷺ خَرَجَ مِنَ الْمَدِينَةِ إِلَى مَكَّةَ لاَ يَخَافُ إِلاَّ اللَّهَ رَبَّ الْعَالَمِينَ فَصَلَّى رَكْعَتَيْنِ