Arabic (Original)
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.
English Translation
Ishaq ibn Yusuf al-Azraq told us, from Ubaydullah - meaning Ibn Umar - from Nafi', from Ibn Umar: that he used to combine the two prayers, the sunset and the night prayer, when twilight had disappeared. He said: And the Messenger of Allah, peace and blessings be upon him, used to combine them when travel pressed upon him.