When the Messenger of Allah ﷺ proceeded before the sun had declined, he delayed the noon prayer till the time of the afternoon prayer, he would then alight and combine the two prayers. If the sun declined before he moved off, he would offer the noon prayer and rode (the beast) - may peace be upon him. Abu Dawud said: The narrator Mufaddal was the judge of Egypt. His supplication was accepted by Allah; he was the son of Fudalah. (Using translation from Abū Dāʾūd 1218)  

«كَانَ رَسُولُ اللهِ ﷺ إِذَا ارْتَحَلَ قَبْلَ أَنْ تَزِيغَ الشَّمْسُ أَخَّرَ الظُّهْرَ إِلَى وَقْتِ الْعَصْرِ ثُمَّ نَزَلَ فَجَمَعَ بَيْنَهُمَا فَإِنْ زَاغَتِ الشَّمْسُ قَبْلَ أَنْ يَرْتَحِلَ صَلَّى الظُّهْرَ ثُمَّ رَكِبَ»  

It was narrated from Abu At-Tufail 'Amir bin Wathilah that Mu'adh bin Jabal told him that they went out with the Messenger of Allah ﷺ in the year of Tabuk, and the Messenger of Allah ﷺ was joining Zuhr and 'Asr, and Maghrib and 'Isha'. He delayed the prayer one day then he went out and prayed Zuhr and 'Asr together, then he went in and came out again and prayed Maghrib and 'Isha'. (Using translation from Nasāʾī 587)  

أَخْبَرَهُ أَنَّهُمْ خَرَجُوا مَعَ رَسُولِ اللهِ ﷺ عَامَ تَبُوكَ فَكَانَ رَسُولُ اللهِ ﷺ «يَجْمَعُ بَيْنَ الظُّهْرِ وَالْعَصْرِ وَالْمَغْرِبِ وَالْعِشَاءِ فَأَخَّرَ الصَّلَاةَ يَوْمًا ثُمَّ خَرَجَ فَصَلَّى الظُّهْرَ وَالْعَصْرَ جَمِيعًا ثُمَّ دَخَلَ ثُمَّ خَرَجَ فَصَلَّى الْمَغْرِبَ وَالْعِشَاءَ جَمِيعًا»