A relative of 'Abdullah ibn Mughaffal hrew pebbles, so he forbade him and said that the Messenger of Allah (PBUH) forbade it and said: It does not catch a game or harm an enemy, but it breaks a tooth and plucks out an eye. Then his relative did it again so he told him: I tell you that the Prophet (PBUH) forbade that and then you go and do it again? I will never speak to you again.