It is narrated from Sayyiduna Ali (may Allah be pleased with him) that once the Prophet (peace and blessings be upon him) sent out an army and appointed an Ansari as their commander, and ordered the people to listen to him and obey him. When they set out, that Ansari became angry with them over something along the way. He said, "Gather firewood." Then he had a fire lit in the wood and said, "Did the Prophet (peace and blessings be upon him) not order you to listen to me and obey me?" The people said, "Of course." He said, "Then enter this fire." The people began to look at one another and said, "It is from this very fire that we have fled and sought refuge with the Prophet (peace and blessings be upon him)." After a short while, his anger subsided and the fire was extinguished. When they returned, they told the Prophet (peace and blessings be upon him) the whole incident. The Prophet (peace and blessings be upon him) said, "If you had entered it once, you would never have come out of it. Remember! Obedience is only in matters of goodness."