They (the Companions) proceeded on the expedition of Tabuk along with the Messenger of Allah ﷺ. He combined the noon and afternoon prayers and the sunset and night prayers. One day he delayed the prayer and came out (of his dwelling) and combined the noon and the afternoon prayers. He then went it and then came out and combined the sunset and the night prayers.  

أَنَّ مُعَاذَ بْنَ جَبَلٍ أَخْبَرَهُمْ أَنَّهُمْ خَرَجُوا مَعَ رَسُولِ اللَّهِ ﷺ فِي غَزْوَةِ تَبُوكَ فَكَانَ رَسُولُ اللَّهِ ﷺ يَجْمَعُ بَيْنَ الظُّهْرِ وَالْعَصْرِ وَالْمَغْرِبِ وَالْعِشَاءِ فَأَخَّرَ الصَّلاَةَ يَوْمًا ثُمَّ خَرَجَ فَصَلَّى الظُّهْرَ وَالْعَصْرَ جَمِيعًا ثُمَّ دَخَلَ ثُمَّ خَرَجَ فَصَلَّى الْمَغْرِبَ وَالْعِشَاءَ جَمِيعًا  

[Machine] "We accompanied the Messenger of Allah ﷺ on the expedition of Tabuk. He used to combine the Dhuhr and Asr prayers, praying them together. Then, he entered (a place) and after that he came out again and prayed the Maghrib and Isha prayers together."  

خَرَجْنَا مَعَ رَسُولِ اللَّهِ ﷺ عَامَ غَزْوَةِ تَبُوكَ فَكَانَ يَجْمَعُ الصَّلَاةَ يَصَلَّى الظُّهْرَ وَالْعَصْرَ جَمِيعًا ثُمَّ دَخَلَ ثُمَّ خَرَجَ بَعْدَ ذَلِكَ فَصَلَّى الْمَغْرِبَ وَالْعِشَاءَ جَمِيعًا  

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»