Sunan At-Tirmidhi

Ibn Umar narrated:""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