Hazrat Abu Bakrah (may Allah be pleased with him) once said that the Prophet (peace and blessings be upon him) forbade throwing pebbles at anyone. One of his cousins said, "He has forbidden this," and then threw a pebble at someone. He (Abu Bakrah) said, "I am narrating to you the hadith of the Prophet (peace and blessings be upon him) that he forbade this, yet you are still doing the same. By Allah, as long as I live, I will never speak to you."