What did the Prophet Muhammad (saw) do when on journeys when it came to offering prayers?
  Narrated Ibn `Abbas:                       Allah's Apostle used to offer the Zuhr and `Asr prayers together on journeys, and also used to offer the Maghrib and `Isha' prayers together. Narrated Anas bin Malik: The Prophet used to offer the Maghrib and the `Isha' prayers together on journeys.