Second-degree relatives [that are forbidden] by rabbinic decree: The mother of his mother, and the mother of his father; the wife of his father's father, and the wife of his mother's father; the wife of his mother's brother from his father's side, and the wife of his father's brother from his mother's side; and the wife of his son's son, and the wife of his daughter's son. A man is permitted to the wife of his father-in-law, and the wife of his step-son, and forbidden to the daughter of his stepson. And his step-son is permitted to his (i.e., the step-father's) wife and to his daughter. [As a result,] such a woman can say, "I am permitted and my daughter is forbidden to you."

[If] her sister is also her sister-in-law, she is subject to either yibbum or chalitza (Yevamot 2:3). How so? His daughter from one he had raped married his brother, and she had a sister from the same mother but from another man, who was married to his second brother, and he died without offspring, she is subject to either chalitza or yibbum. [If] the daughter of his daughter was married to his brother, and the daughter of his wife was married to his brother, and the daughter of the daughter of his wife was married to his brother, and she had a sister from the same father but from another woman who was married to his second brother, and he died without offspring, she is subject to either chalitza or yibbum.

They asked Rabbi Eliezer, "A mamzer, can he inherit?" He said to them, "Can he perform chalitza?" "Can he perform chalitza?" He said to them, "Can he inherit?" They said to him, "Can one whitewash one's house?" He said to them, "Can one whitewash one's grave?" They said to him, "Can one whitewash one's grave?" He said to them, "Can one whitewash one's house?" They said to him, "Can one raise dogs?" He said to them, "Can one raise pigs?" "Can one raise pigs?" He said to them, "Can one raise chickens?" "Can one raise chickens?" He said to them, "Can one raise small livestock?" "Can one raise small livestock?" He said to them, "Can one save a shepherd from the grasp of a wolf?" "Can one save a shepherd from the grasp of a wolf?" He said to them, "It would be the same if you had only asked about the lamb." "And the lamb, may he save it?" He said to them, "It would be the same if you had only asked about the shepherd." "So-and-so, what will become of him in the World to Come?" He said to them, "It would be the same if you had only asked about So-and-so (i.e., another person), what will become of him in the World to Come?" And it was not that Rabbi Eliezer was [purposely] being argumentative; rather than he never said anything that he had not himself heard in his days.