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:2609 – ʿAlī b. Baḥr > Ḥātim b. Ismāʿīl > Muḥammad b. ʿAjlān > Nāfiʿ > Abū Salamah > Abū Hurayrah

The Prophet ﷺ said: When three are on a journey, they should appoint one of them as their commander. Nafi' said: We said to AbuSalamah: You are our commander.  

أبو داود:٢٦٠٩ – حَدَّثَنَا عَلِيُّ بْنُ بَحْرٍ حَدَّثَنَا حَاتِمُ بْنُ إِسْمَاعِيلَ حَدَّثَنَا مُحَمَّدُ بْنُ عَجْلاَنَ عَنْ نَافِعٍ عَنْ أَبِي سَلَمَةَ عَنْ أَبِي هُرَيْرَةَ

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِذَا كَانَ ثَلاَثَةٌ فِي سَفَرٍ فَلْيُؤَمِّرُوا أَحَدَهُمْ قَالَ نَافِعٌ فَقُلْنَا لأَبِي سَلَمَةَ فَأَنْتَ أَمِيرُنَا  

See similar narrations below:

Collected by Suyūṭī
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