LANDMARK (Heb. gevûl). An object used to mark the boundary of a field. Landmarks were often such movable objects as a stone or a post. Since a cunning and unscrupulous individual could take advantage of his neighbor by shifting the location of such boundary marks, thus robbing him of part of his means of support, such removal of landmarks was prohibited by the Mosaic Law (Deut.19.14; Deut.27.17). Hebrew piety denounced the act (Prov.22.28; Prov.23.10), and it was considered equal to theft (Job.24.2).

International Standard Bible Encyclopedia (1915)

The boundary may have been marked, as at present, simply by a furrow or stone. The iniquity of removing a landmark is frequently insisted on (De 19:14; 27:17; Pr 22:28; 23:10; Job 24:2 gebhulah), its removal being equivalent to theft.