(Mishnah): If Reuven says, "this is my son', he is believed (this will be explained);

If Reuven says, "this is my brother', he is not believed (to make his other brothers share their inheritance with this person. Rather, Reuven divides his own share of their father's estate with this person, since he had testified that this person was his brother).

When this person dies, Reuven gets back what the person took from Reuven's share.

If this person had received property from another place, all the brothers share it.

If a person died and he had a daitiki (gift document of a deathly ill person) tied to his thigh, it is worthless.

If he said, "I give to ploni what is written in this document", whether ploni could inherit him or not, ploni acquires it.

(Gemara): If a person is known to be his son and on his death bed he said that the person is not actually his son, he is not believed. If he said about a person not known to be his son that he is, in fact, his son, he is believed.

If he was standing near the tax collector and he said, "he is my son" and then later said, "he is my slave" - he is believed.

If he first said, "you are my slave" and then said, "you are my son", he is not believed.

Some have the text, "he is believed".

R. Mana: When people of Nafta refer to their sons as slaves, they merely mean that they make them work hard like slaves.