´Mu'adh bin Jabal narrated:` "While the Prophet as at the Battle of Tabuk, if he wanted to depart before the sun's decline he would delay Zuhr so that he could pray it together with Asr. If he wanted to depart after the sun's decline, he would hasten Asr to Zuhr, and pray Zuhr and Asr together, and then move it. If he wanted to depart before Maghrib he would delay Maghrib until he prayed it with Isha, and if he wanted to depart after Maghrib he would hasten Isha so that he would pray it along with Maghrib."
Hadith Referenceسنن ترمذي / أبواب السفر / 553
Hadith Gradingالألبانی:صحيح، صحيح أبي داود (1106) ، الإرواء (578) ، التعليقات الجياد
Hadith Takhrij«صحیح مسلم/المسافرین 6 (706) ، سنن ابی داود/ الصلاة 274 (1206، 1220) ، سنن ابن ماجہ/الإقامة 74 (1070) ، ( تحفة الأشراف : 11320) ، موطا امام مالک/قصر الصلاة 1 (2) ، مسند احمد (5/229، 230، 233، 236، 237، 241) ، سنن الدارمی/الصلاة 182 (1556) (صحیح)»
´Nafi narrated:` "Ibn Umar had been requested to urgently attend to one of his wives, so he hurried en route and delayed Maghrib until the twilight disappeared, then he dismounted to combine them (the prayers). Then he informed them that the Messenger of Allah would do that when he was in a hurry on a trip."