'Landmark' in the Bible

Thou shalt not remove thy neighbour's landmark, which they of old time have set in thine inheritance, which thou shalt inherit in the land that the LORD thy God giveth thee to possess it.

Cursed be he that removeth his neighbour's landmark. And all the people shall say, Amen.

Remove not the ancient landmark, which thy fathers have set.

Remove not the old landmark; and enter not into the fields of the fatherless: