It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "When three people are on a journey, one of them should lead them in prayer."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Nafi' bin Abi Nu'aym except Ziyad bin Yunus."