They contain 13 mitzvot: five positive mitzvot and eight negative mitzvot. They are:
i) The laws governing the acquisition of a Hebrew servant;
ii) Not to sell him in the manner that servants are usually sold;
iii) Not to make him perform excruciating labor;
iv) Not to make him perform servile tasks;
v) Not to allow a resident alien to make him perform excruciating labor;
vi) To grant a Hebrew servant a severance gift when he attains his freedom;
vii) Not to let him go free empty-handed;
viii) To redeem a Hebrew maid-servant;
ix) To designate her as a wife;
x) Not to sell her a second time;
xi) To have a Canaanite servant work forever, unless his master causes one of his primary limbs to fall;
xii) Not to return to his master a servant who fled from the Diaspora to Eretz Yisrael;
xiii) Not to oppress this servant who has fled to us.
These mitzvot are explained in the chapters that follow.