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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
Nine Red Heifers were prepared from the time that the Jewish people were commanded this mitzvah until the Second Temple was destroyed. The first was prepared by Moses, the second by Ezra, and another seven were prepared from Ezra until the Temple's destruction. The tenth Heifer will be prepared by Moshiach, may he speedily be revealed, Amen, may it so be the will of G-d.
  –Mishneh Torah, Laws of the Red Heifer 3:4
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