"Then Moses commanded them, saying, 'At the end of every seven years, at the time of the year of remission of debts, at the Feast of Booths," (Deuteronomy 31:10-12)
"You shall not move your neighbor's boundary mark, which the ancestors have set, in your inheritance which you will inherit in the land that the LORD your God gives you to possess." (Deuteronomy 19:14)