לאן הולכת ההלכה? [ב] סמכות רבנית

(5) If a man says, “So and so, my firstborn son, shall not receive a double portion”, or “So and so, my son, shall not inherit with his brothers”, he has said nothing, for he has made a condition contrary to what is written in the Torah. If a man apportioned his property to his sons by word of mouth, and gave much to one and little to another, or made them equal to the firstborn, his words are valid. But if he had said [that it should be so] “by inheritance”, he has said nothing. If he had written down, whether at the beginning or in the middle or at the end [of his will] that it should be as a gift, his words are valid. If a man said, “So and so a man shall inherit from me” and he has a daughter; or “My daughter shall inherit from me”, and he has a son, he has said nothing, for he has made a condition contrary to what is written in the Torah. Rabbi Johanan ben Baroka says: “If he said [that so and so shall inherit from me] of one that was qualified to inherit from him, his words are valid, but if of one that was not qualified to inherit from him his words do not remain valid.” If a man wrote away his property to others and passed over his sons, what he has done is done, but the Sages are not comfortable with it. Rabban Shimon ben Gamaliel says: “If has sons did not behave properly, it should be counted to his credit.”