Hazrat Ibn Sabit narrates that the Holy Prophet (peace be upon him) cursed four types of people: one who sacrifices in the name of anyone other than Allah, one who gives shelter to a mischief-maker, one who disobeys his parents, and one who steals a boundary marker. The narrator says that I asked, "What is meant by a boundary marker?" It is one who takes his brother's land and adds it to his own land.