Abu Al-Bakhtari narrates that Sayyiduna Umar (may Allah be pleased with him) once said to Sayyiduna Abu Ubaidah bin Al-Jarrah (may Allah be pleased with him): "Stretch out your hand so that I may pledge allegiance to you, because I heard the Prophet (peace and blessings be upon him) say that you are the trustworthy one of this Ummah." He replied: "I cannot go ahead of the one whom the Prophet (peace and blessings be upon him) commanded to lead us and who continued to lead us until the Prophet (peace and blessings be upon him) passed away."