It was narrated from Ibn 'Umar that if the Messenger of Allah ﷺ was in a hurry to travel, he would combine Maghrib and 'Isha'.  

أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ إِذَا جَدَّ بِهِ السَّيْرُ جَمَعَ بَيْنَ الْمَغْرِبِ وَالْعِشَاءِ  

"If the Messenger of Allah ﷺ was in a hurry to travel, or some emergency arose, he would combine Maghrib and 'Isha'."  

كَانَ رَسُولُ اللَّهِ ﷺ إِذَا جَدَّ بِهِ السَّيْرُ أَوْ حَزَبَهُ أَمْرٌ جَمَعَ بَيْنَ الْمَغْرِبِ وَالْعِشَاءِ  

"I heard Az-Zuhri say: 'Salim told me that his father said: 'I saw the Prophet ﷺ, if he was in a hurry to travel, joining Maghrib and 'Isha'."  

رَأَيْتُ النَّبِيَّ ﷺ إِذَا جَدَّ بِهِ السَّيْرُ جَمَعَ بَيْنَ الْمَغْرِبِ وَالْعِشَاءِ