آداب وأحكام السفر
Abu Sa‘īd and Abu Hurayrah (may Allah be pleased with both of them) reported that the Prophet (may Allah's peace and blessings be upon him) said: "When three people set out on a journey, they should appoint one of them as their leader."
عن أبي سعيد وأبي هريرة -رضي الله عنهما- مرفوعاً: «إذا خرج ثلاثة في سفر فَلْيُؤَمِّرُوا أحدهم».
شرح الحديث :
The Messenger of Allah (may Allah’s peace and blessings be upon him) commanded travelers to appoint one of them as their leader. It should be the best and most level-headed of them they appoint to manage their affairs, because if they do not appoint one of them as their leader, their affairs would become chaotic.