It is narrated from Hazrat Bukair (may Allah have mercy on him) that when the Messenger of Allah (peace and blessings be upon him) appointed Sayyiduna Usama bin Zaid (may Allah be pleased with them both) as commander, people objected. So the Messenger of Allah (peace and blessings be upon him) said: "You speak about Usama being young in age, and you spoke in the same way about his father. By Allah! He is worthy of leadership." Hazrat Bukair (may Allah have mercy on him) says: I was informed that Hazrat Ubaidah bin Sufyan (may Allah have mercy on him) said: "I hope this decision remains in effect till today." It is narrated from Sulaiman bin Yasar (may Allah have mercy on him) that the Messenger of Allah (peace and blessings be upon him) appointed Usama (may Allah be pleased with him) as commander over an army and ordered that the village of Yabna be burned. When the army set out, Usama delayed a little until the Messenger of Allah (peace and blessings be upon him) passed away. Then Usama came to Sayyiduna Abu Bakr Siddiq (may Allah be pleased with him) and said: "What do you command me?" He replied: "Act upon what the Messenger of Allah (peace and blessings be upon him) commanded you; I will neither add to it nor subtract from it." People said: "If you send Usama and take the nearby people with him, the Bedouin Arabs will become apostates and attack Madinah." Sayyiduna Abu Bakr Siddiq (may Allah be pleased with him) said: "By Allah! Even if wild beasts devour me, I will not revoke the command of the Messenger of Allah (peace and blessings be upon him). Go, Allah will help us. But if you wish, you may keep Sayyiduna Umar bin Khattab (may Allah be pleased with him) with you." Usama said: "I went to Umar (may Allah be pleased with him) and gave him permission." So Sayyiduna Umar (may Allah be pleased with him) said: "May Allah have mercy on you."