It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that when the Prophet (peace and blessings be upon him) was in a hurry during a journey, he would perform a 'perceived' combining (jam' suri) between Maghrib and Isha prayers.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 5516