Sayyiduna Ali (may Allah be pleased with him) said: When Sayyiduna al-Mughirah bin Shu'bah (may Allah be pleased with him) went on a military expedition with the Prophet (peace and blessings be upon him), he would carry a spear with him. When they returned, he would throw it down so that someone, taking it to be his, would pick it up. Sayyiduna Ali (may Allah be pleased with him) said: "I will certainly mention this to the Prophet (peace and blessings be upon him)." At this he said: "Do not do that, for if you do, lost property will no longer be picked up."