Silsilah as-Sahihah 2112 — Three travelers should pray in congregation

It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "When three people are on a journey, one of them should lead the others in prayer, and the one most deserving of this is the one who knows the most of the Qur'an by heart."