B'Har deals primarily with Shmita & Yovel. Every 7 years, Hashem commands the Land to rest. G-d promises a special blessing so we will have enough to eat for 3 years even when the fields lie fallow. In the 50th year of Yovel, land reverts back to its original owner; slaves are freed & debts canceled.

We are commanded to assist the poor through tzedaka & chesed, & by raising them to help themselves. We may not charge interest on loans to fellow Jews. We are to observe Shabbat & shun idolatry. We may not oppress others, by word or deed, even refraining from referring to a convert's past life.