"I prayed Zuhr with the Prophet on a journey as two Rak'ah, and two Rak'ah after it."
Jami` at-Tirmidhi Book 6, Hadith 8
← Previous Hadith "I accompanied the Messenger of Allah on eighteen journeys, and I did not see him leave the two Rak'ah when the sun waned before Zuhr."

Jami` at-Tirmidhi Book 6, Hadith 7 Next Hadith → "I prayed with the Prophet both, while a resident and while traveling. So I prayed four for Zuhr with him as a resident, and two Rak'ah after it. I prayed two Rak'ah for Zuhr with him while traveling and two Rak'ah after it, and two Rak'ah for Asr, and he did not pray anything after it. Maghrib while a resident and traveling is the same; three Rak'ah, it is not decreased as a resident nor while traveling. It is Witr of the day, and after it are two Rak'ah."

Jami` at-Tirmidhi Book 6, Hadith 9