Leviticus 24-27 provides instructions regarding conversation and conduct in the promised land. Profanity is forbidden and dealt with severely, vows and freewill offerings to the Lord are to be carried out as promised. Also, rules are given regarding regular periods of rest for the land. Every seventh year there must be rest given without sowing or reaping, and every fiftieth year marks a jubilee when debts are cancelled and possessions go back to their original owners. God promises to bless in abundance the year prior to the Sabbath year and Jubilee years, just like He supplied the double portion of daily manna before each Sabbath. "These are the decrees, laws, and regulations that the Lord established on Mount Sinai between himself and the Israelites through Moses".