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.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
abudawud:2608 – ʿAlī b. Baḥr b. Barrī > Ḥātim b. Ismāʿīl > Muḥammad b. ʿAjlān > Nāfiʿ > Abū Salamah > Abū Saʿīd al-Khudrī

The Prophet ﷺ said: When three are on a journey, they should appoint one of them as their commander.  

أبو داود:٢٦٠٨ – حَدَّثَنَا عَلِيُّ بْنُ بَحْرِ بْنِ بَرِّيٍّ حَدَّثَنَا حَاتِمُ بْنُ إِسْمَاعِيلَ حَدَّثَنَا مُحَمَّدُ بْنُ عَجْلاَنَ عَنْ نَافِعٍ عَنْ أَبِي سَلَمَةَ عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِذَا خَرَجَ ثَلاَثَةٌ فِي سَفَرٍ فَلْيُؤَمِّرُوا أَحَدَهُمْ  

See similar narrations below:

Collected by Bayhaqī, Suyūṭī
bayhaqi:10351 – Abū Dāwud > ʿAlī b. Baḥr b. Barrī > Ḥātim b. Ismāʿīl > Muḥammad b. ʿAjlān > Nāfiʿ > Abū Salamah > Abū Saʿīd al-Khudrī

The Prophet ﷺ said: When three are on a journey, they should appoint one of them as their commander. (Using translation from Abū Dāʾūd 2608)   

البيهقي:١٠٣٥١ – قَالَ وَحَدَّثَنَا أَبُو دَاوُدَ ثنا عَلِيُّ بْنُ بَحْرِ بْنِ بَرِّيٍّ ثنا حَاتِمُ بْنُ إِسْمَاعِيلَ ثنا مُحَمَّدُ بْنُ عَجْلَانَ عَنْ نَافِعٍ عَنْ أَبِي سَلَمَةَ عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ

أَنَّ رَسُولَ اللهِ ﷺ قَالَ إِذَا خَرَجَ ثَلَاثَةٌ مِنْ سَفَرٍ فَلْيُؤَمِّرُوا أَحَدَهُمْ  

suyuti:2436a –

The Prophet ﷺ said: When three are on a journey, they should appoint one of them as their commander. (Using translation from Abū Dāʾūd 2608)   

السيوطي:٢٤٣٦a –

"إِذا كانَ ثلاثةٌ في سفرٍ فليُؤَمِّرُوا أحدَهُم".  

[ق] البيهقى في السنن عن أبي هريرة
suyuti:1697a –

The Prophet ﷺ said: When three are on a journey, they should appoint one of them as their commander. (Using translation from Abū Dāʾūd 2608)   

السيوطي:١٦٩٧a –

"إِذا خرج ثَلاثَةٌ في سَفر فيلؤمِّروا أحدَهُمْ" .  

[د] أبو داود [ع] أبو يعلى [ق] البيهقى في السنن [ض] ضياء المقدسي في مختاره عن أبي سعيد، [د] أبو داود عن أبي هريرة