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Daily Mitzvah

Day 88: Negative Commandment 336, 335, 337, 338, 339

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Negative Commandment 336 (Digest)
Incest with a Daughter

It is forbidden to have incestuous relations with one's daughter.

The Torah doesn't explicitly mention this prohibition—for if incest with a granddaughter is forbidden, how much more so incest with a daughter. And the Sages deduced from the wording of the verses that incest with a daughter is biblically prohibited.

Negative Commandment 335 (Digest)
Incest with a Daughter's Daughter

"The nakedness of . . . [or] your daughter's daughter you shall not uncover their nakedness, for they are your own nakedness"—Leviticus 18:10.

It is forbidden to have incestuous relations with one's daughter's daughter.

Negative Commandment 337 (Digest)
Incest with a Mother-in-Law or Wife's Daughter

"You shall not uncover the nakedness of a woman and her daughter"Leviticus 18:17.

It is forbidden to have incestuous relations with one's wife's mother or daughter.

Negative Commandment 338 (Digest)
Incest with a Wife's Paternal Grandmother or a Wife's Son's Daughter

"...her son's daughter..."Leviticus 18:17.

It is forbidden to have incestuous relations with one's wife's paternal grandmother or one's wife's son's daughter

Negative Commandment 339 (Digest)
Incest with a Wife's Maternal Grandmother or a Wife's Daughter's Daughter

"...and her daughter's daughter you shall not marry"Leviticus 18:17.

It is forbidden to have incestuous relations with one's wife's maternal grandmother or one's wife's daughter's daughter

Translation of (the unabridged text of) Sefer Hamitzvot by Rabbi Berel Bell, member of the Rabbinical Court of Montreal and director of Teacher Training for the Jewish Learning Institute.

From "Sefer Hamitzvot in English," published by Sichos in English.
Daily Quote
Just like in the case of two people who are wrestling... if one of them moves with sloth and lethargy, he will be easily defeated and felled, even if he is stronger than his fellow; so, too, in battling one's evil inclination, one can prevail over it ... only with alacrity that comes from joy and from a heart that is free and cleansed from every trace of worry and sadness...
  –Rabbi Schneur Zalman of Liadi
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