It is narrated from Mu'adh bin Jabal (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) used to combine the Zuhr and Asr, and Maghrib and Isha prayers during his journey to Tabuk.
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 365
Hadith Takhrijأخرجه مسلم: صلاة المسافرين، باب الجمع بين الصلاتين في الحضر (706).