Shortening the Prayers (At-Taqseer)
18/13. Chapter:
To offer Maghrib and "Isha" prayers together on a journey
Sahih Bukhari
حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، قَالَ حَدَّثَنَا سُفْيَانُ، قَالَ سَمِعْتُ الزُّهْرِيَّ، عَنْ سَالِمٍ، عَنْ أَبِيهِ، قَالَ كَانَ النَّبِيُّ صلى الله عليه وسلم يَجْمَعُ بَيْنَ الْمَغْرِبِ وَالْعِشَاءِ إِذَا جَدَّ بِهِ السَّيْرُ.
Narrated Salim's father: The Prophet (ﷺ) used to offer the Maghrib and `Isha' prayers together whenever he was in a hurry on a journey.
Reference : Sahih al-Bukhari 1106In-book reference : Book 18, Hadith 26USC-MSA web (English) reference : Vol. 2, Book 20, Hadith 209