Deuteronomy 27:17

Cursed is he who takes his neighbour's landmark from its place. And let all the people say, So be it.

Deuteronomy 19:14

Your neighbour's landmark, which was put in its place by the men of old times, is not to be moved or taken away in the land of your heritage which the Lord your God is giving you.

Proverbs 22:28

Let not the old landmark be moved which your fathers have put in place.

Proverbs 23:10-11

Do not let the landmark of the widow be moved, and do not go into the fields of those who have no father;

Treasury of Scripture Knowledge

Summary

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

Bible References

General references

Deuteronomy 19:14
Your neighbour's landmark, which was put in its place by the men of old times, is not to be moved or taken away in the land of your heritage which the Lord your God is giving you.
Proverbs 22:28
Let not the old landmark be moved which your fathers have put in place.
Proverbs 23:10
Do not let the landmark of the widow be moved, and do not go into the fields of those who have no father;

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain