(13) باب الْجَمْعِ فِي السَّفَرِ بَيْنَ الْمَغْرِبِ وَالْعِشَاءِ
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 1106
In-book reference: Book 18, Hadith 26
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 2, Book 20, Hadith 209