When the Messenger of Allah ﷺ was in a state of hurry on a journey, he combined the sunset and 'Isha' prayers.  

كَانَ رَسُولُ اللَّهِ ﷺ إِذَا عَجِلَ بِهِ السَّيْرُ جَمَعَ بَيْنَ الْمَغْرِبِ وَالْعِشَاءِ  

Nafi' reported that when Ibn 'Umar was in a state of hurry on a journey, he combined the sunset and 'Isha' prayers after the twilight had disappeared, and he would say that when the Messenger of Allah ﷺ was in a state of hurry on a journey, he combined the sunset and 'Isha' prayers.  

أَنْ يَغِيبَ الشَّفَقُ وَيَقُولُ إِنَّ رَسُولَ اللَّهِ ﷺ كَانَ إِذَا جَدَّ بِهِ السَّيْرُ جَمَعَ بَيْنَ الْمَغْرِبِ وَالْعِشَاءِ  

I saw the Messenger of Allah ﷺ combining the sunset and Isha' prayers when he was in a hurry on a journey.  

عَنْ أَبِيهِ رَأَيْتُ رَسُولَ اللَّهِ ﷺ يَجْمَعُ بَيْنَ الْمَغْرِبِ وَالْعِشَاءِ إِذَا جَدَّ بِهِ السَّيْرُ  

I saw the Messenger of Allah ﷺ delaying the sunset prayer till he would combine it with the 'Isha' when he hastened to set out on a journey.  

رَأَيْتُ رَسُولَ اللَّهِ ﷺ إِذَا أَعْجَلَهُ السَّيْرُ فِي السَّفَرِ يُؤَخِّرُ صَلاَةَ الْمَغْرِبِ حَتَّى يَجْمَعَ بَيْنَهَا وَبَيْنَ صَلاَةِ الْعِشَاءِ  

When the Messenger of Allah ﷺ set out on a journey before the sun declined (from the meridian), he delayed the noon prayer till the afternoon prayer, and then dismounted (his ride) and combined them (noon and afternoon prayers), but if the sun had declined before his setting out on a journey, he observed the noon prayer and then mounted (the ride).  

كَانَ رَسُولُ اللَّهِ 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  

When the Messenger of Allah ﷺ intended to combine two prayers on a journey, he delayed the noon prayer till came the early time of the afternoon prayer, and then combined the two.  

كَانَ النَّبِيُّ ﷺ إِذَا أَرَادَ أَنْ يَجْمَعَ بَيْنَ الصَّلاَتَيْنِ فِي السَّفَرِ أَخَّرَ الظُّهْرَ حَتَّى يَدْخُلَ أَوَّلُ وَقْتِ الْعَصْرِ ثُمَّ يَجْمَعُ بَيْنَهُمَا  

Anas reported that when the Messenger of Allah ﷺ had to set out on a journey hurriedly, he delayed the noon prayer to the earlier time for the afternoon prayer, and then he would combine them, and he would delay the sunset prayer to the time when the twilight would disappear and then combine it with the 'Isha' prayer.  

عَنِ النَّبِيِّ ﷺ إِذَا عَجِلَ عَلَيْهِ السَّفَرُ يُؤَخِّرُ الظُّهْرَ إِلَى أَوَّلِ وَقْتِ الْعَصْرِ فَيَجْمَعُ بَيْنَهُمَا وَيُؤَخِّرُ الْمَغْرِبَ حَتَّى يَجْمَعَ بَيْنَهَا وَبَيْنَ الْعِشَاءِ حِينَ يَغِيبُ الشَّفَقُ