The Sifre asked why says, "You shall not remove your neighbor's landmark," when already says, "You shall not rob." The Sifre explained that teaches that one who removes a neighbor's boundary mark violates two negative commandments. The Sifre further explained that lest one think that this conclusion applies outside the Land of Israel, says, "in your inheritance that you will inherit in the land," indicating that only in the Land of Israel would one violate two negative commandments. Outside the Land of Israel, one would violate only the one commandment of , "You shall not rob." The Sifre further taught that one violates the command of not to move a neighbor's landmark (1) if one moves an Israelite's landmark, (2) if one substitutes the statement of Eliezer ben Hurcanus for that of Rabbi Joshua or vice versa, or (3) if one sells a burial plot purchased by an ancestor.