Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) combined Zuhr and Asr, and Maghrib and Isha, during the expedition of Tabuk.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5525