THE IMPORTANCE OF LANDMARKS
In Bible lands, when those who have the old-time customs, want to prove the extent of their property, whether it is held temporarily or permanently, landmarks hold an important place. The boundary line is marked by a double furrow, but at each end of the furrow a heap of stones, called "the stones of the boundary," is placed. If the rain does away with the furrow line, the landmark is still there to indicate the boundary. To remove one of these landmarks is considered to be a great sin.
Sometimes small community wars have been precipitated by the removing of a landmark. The law of Moses had this statute: "Thou shalt not remove thy neighbor's landmark, which they of old time have set in thine inheritance" (Deuteronomy 19:14).
[Manners And Customs of Bible Lands]