Study Bava Batra folio 156A with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
And according to your reasoning, that the money he receives in exchange for the property is a reason one could consider his sale valid, if he sold property worth 5 dinars for 6 dinars, would his sale also be a valid sale?
Rather, the rabbis maintain that a child’s inclination is to be attracted to money. And if you say that his sale is a valid sale, there may be times that there are potential buyers who rattle the dinars before him in order to tempt him to sell, and he will go and sell all of his father’s property.
§ Rav Naḥman says that Shmuel says: Children who have reached the age of majority, i.e., a boy who is 13 years old and a girl who is 12 years old, are examined for signs indicating puberty if it is necessary to determine their adulthood for the purpose of betrothal, for the purpose of divorce, for
The Talmud asks: But once I examined the boy for the purpose of betrothal, why do I need to examine him again for the purpose of divorce? The Talmud answers: This is necessary only with regard to the levirate marriage of a minor, as we learned in a Mishnah (Nidda 45a): A boy who is 9 years and one
The Talmud explains why it is necessary to mention examining a boy for the purpose of ḥalitza: This is mentioned to the exclusion of that which R' Yosei says, as R' Yosei says: “Man,” i.e., an adult man, is written in the Torah passage with regard to ḥalitza, as the verse states: “And if the man d