פירוש על קידושין 39:6

There are two positions here as to the meaning of “be-gapo.” But even these interpretations are difficult to understand. The Talmud will explain them as we proceed.

The first opinion in the baraita read “begapo” is if it said “begufo” (the Hebrew letters are the same. But what does this mean?
Rava interprets it to mean that if his master strikes him and he loses a limb, he does not go free as does a non-Jewish slave.

Abaye finds another place to derive the law that a Jewish slave does not go out with loss of major limb. The Torah explicitly states that a female Jewish slave does not go out “as slaves do” and this can be interpreted to refer to the law that a non-Jewish slaves go out at loss of major limb.