It is narrated from Hazrat Mu'adh (may Allah be pleased with him) that on the occasion of the Battle of Tabuk, if the Prophet Muhammad (peace and blessings be upon him) set out before the decline of the sun, he would delay the Zuhr prayer and combine both Zuhr and Asr prayers at the time of Asr. And if he set out after the decline of the sun, he would first perform both Zuhr and Asr prayers. And if he set out after Maghrib, he would perform the Isha prayer together with Maghrib beforehand and then set out.