Chapter 1, Mishna 2
Exploring differences between a Hebrew slave who sold himself into slavery and one who was sold by the court because he stole and could not make restitution. How do these cases differ from the slave who is pierced, i.e. the slave who opts to remain enslaved after his term of servitude ends? How do all these differ from the case of a Jew who is sold, or sells himself, to a gentile? What happens when his relatives, or a fellow Jew, or he himself redeems him from the gentile master?