"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