Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
bayhaqi:5511Abū Muḥammad ʿAbdullāh b. Yūsuf al-Aṣbahānī > Abū Saʿīd b. al-Aʿrābī > al-Ḥasan b. Muḥammad al-Zaʿfarānī > Sufyān > al-Zuhrī > Sālim from his father

[Machine] That the Prophet ﷺ used to combine Maghrib and Isha prayers when he was traveling  

البيهقي:٥٥١١أَخْبَرَنَا أَبُو مُحَمَّدٍ عَبْدُ اللهِ بْنُ يُوسُفَ الْأَصْبَهَانِيُّ أنبأ أَبُو سَعِيدِ بْنُ الْأَعْرَابِيِّ ثنا الْحَسَنُ بْنُ مُحَمَّدٍ الزَّعْفَرَانِيُّ ثنا سُفْيَانُ عَنِ الزُّهْرِيِّ عَنْ سَالِمٍ عَنْ أَبِيهِ

أَنَّ النَّبِيَّ ﷺ كَانَ إِذَا جَدَّ بِهِ السَّيْرُ جَمَعَ بَيْنَ الْمَغْرِبِ وَالْعِشَاءِ  

أَخْرَجَهُ الْبُخَارِيُّ وَمُسْلِمٌ فِي الصَّحِيحِ مِنْ حَدِيثِ سُفْيَانَ بْنِ عُيَيْنَةَ

See similar narrations below:

Collected by Nasāʾī, Mālik, Nasāʾī's Kubrá
nasai:598Qutaybah b. Saʿīd > Mālik > Nāfiʿ > Ibn ʿUmar

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'.  

النسائي:٥٩٨أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ عَنْ مَالِكٍ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ

أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ إِذَا جَدَّ بِهِ السَّيْرُ جَمَعَ بَيْنَ الْمَغْرِبِ وَالْعِشَاءِ  

malik:9-3Mālik > Nāfiʿ > ʿAbdullāh b. ʿUmar

3 Yahya related to me from Malik from Nafi that Abdullah ibn Umar said, "The Messenger of Allah ﷺ used to join maghrib and isha together when it was urgent to travel."  

مالك:٩-٣وَحَدَّثَنِي عَنْ مَالِكٍ عَنْ نَافِعٍ أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ

قَالَ كَانَ رَسُولُ اللَّهِ ﷺ إِذَا عَجِلَ بِهِ السَّيْرُ يَجْمَعُ بَيْنَ الْمَغْرِبِ وَالْعِشَاءِ  

nasai-kubra:1585Qutaybah b. Saʿīd > Mālik > Nāfiʿ > Ibn ʿUmar

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'. (Using translation from Nasāʾī 598)  

الكبرى للنسائي:١٥٨٥أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ عَنْ مَالِكٍ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ

«أَنَّ رَسُولَ اللهِ ﷺ كَانَ إِذَا جَدَّ بِهِ السَّيْرُ جَمَعَ بَيْنَ الْمَغْرِبِ وَالْعِشَاءِ»