حَدَّثَنَا إِسْحَاقُ بْنُ يُوسُفَ الْأَزْرَقُ عَنْ عُبَيْدِ اللَّهِ يَعْنِي ابْنَ عُمَرَ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ أَنَّهُ كَانَ يَجْمَعُ بَيْنَ الصَّلَاتَيْنِ الْمَغْرِبِ وَالْعِشَاءِ إِذَا غَابَ الشَّفَقُ قَالَ وَكَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَجْمَعُ بَيْنَهُمَا إِذَا جَدَّ بِهِ السَّيْرُ
مسند امام احمد بن حنبل · Hadith 4472
It was narrated from Naafi' from Ibn 'Umar that he used to put two prayers together, Maghrib and 'Isha', when the red afterglow disappeared. He said; The Messenger of Allah (PBUH) would put them together if he wanted to hasten in his travel.
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020