It is narrated from Abu Bakhtari that Sayyiduna Umar (may Allah be pleased with him) said to Sayyiduna Abu Ubaidah bin Jarrah (may Allah be pleased with him): "Extend your hand so that I may pledge allegiance to you, because I heard the Messenger of Allah (peace and blessings be upon him) say that you are the trustworthy one of this Ummah, that is, an extremely reliable man." So Sayyiduna Abu Ubaidah (may Allah be pleased with him) said: "How can I go ahead of the man whom the Messenger of Allah (peace and blessings be upon him) commanded to lead us in prayer, and then he led us in prayer until his death?"