Sunan an-Nasa'i · 598
Sahih · Abu Ghuddah
Sahih · Al-Albani
Sahih · Zubair Ali Zai
أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ إِذَا جَدَّ بِهِ السَّيْرُ جَمَعَ بَيْنَ الْمَغْرِبِ وَالْعِشَاءِ .
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