← Back to Shiurim

Sefer Hamitzvosספר המצוות

Day 89: Negative Commandment 340, 341, 342, 343, 344, 345

Shabbat, 15 Iyar 5786 / May 2, 2026

Negative Commandment 340 (Digest)

Incest with a Paternal Aunt

"You shall not uncover the nakedness of your father's sister"—Leviticus 18:12.

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

Unabridged English Text of this Mitzvah »

« Close

> The 340th prohibition is that one is forbidden from having relations with one's father's sister.

>

>

> The source of this commandment is G‑d's statement,;) "do not commit incest with your father's sister."

>

>

> For this prohibition the punishment is kares if intentional, and a sin-offering if unintentional.

>

>

>

> Footnotes

>

>

>

> 1.

>

> Lev. 18:12.

Negative Commandment 341 (Digest)

Incest with a Maternal Aunt

"You shall not uncover the nakedness of your mother's sister"—Leviticus 18:13.

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

Unabridged English Text of this Mitzvah »

« Close

> The 341st prohibition is that one is forbidden from having relations with one's mother's sister.

>

>

> The source of this commandment is G‑d's statement,;) "do not commit incest with your mother's sister."

>

>

> For this prohibition the punishment is kares if intentional, and a sin-offering if unintentional.

>

>

>

> Footnotes

>

>

>

> 1.

>

> Lev. 18:13.

Negative Commandment 342 (Digest)

Incest with an Uncle's Wife

"You shall not come near his wife; she is your aunt"—Leviticus 18:14.

It is forbidden to have incestuous relations with one's father's brother's wife.

Unabridged English Text of this Mitzvah »

« Close

> The 342nd prohibition is that one is forbidden from having relations with one's father's brother's wife.

>

>

> The source of this commandment is G‑d's statement,;) "do not commit incest with his wife, for she is your aunt."

>

>

> For this prohibition the punishment is kares if intentional, and a sin-offering if unintentional.

>

>

>

> Footnotes

>

>

>

> 1.

>

> Lev. 18:14.

Negative Commandment 343 (Digest)

Incest with a Daughter-in-Law

"You shall not uncover the nakedness of your daughter-in-law"—Leviticus 18:15.

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

Unabridged English Text of this Mitzvah »

« Close

> The 343rd prohibition is that one is forbidden from having relations with one's son's wife.

>

>

> The source of this commandment is G‑d's statement,;) "do not commit incest with your daughter-in-law."

>

>

> For this prohibition the punishment is stoning .;) If the act was intentional, but there was no valid testimony or no one knew of the transgression, the punishment is kares. If it was done unintentionally, a sin-offering is brought.

>

>

>

> Footnotes

>

>

>

> 1.

>

> Lev. 18:15.

>

>

>

> 2.

>

> See note to N320.

Negative Commandment 344 (Digest)

Incest with a Brother's Wife

"You shall not uncover the nakedness of your brother's wife"—Leviticus 18:16.

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

Unabridged English Text of this Mitzvah »

« Close

> The 344th prohibition is that one is forbidden from having relations with one's brother's wife.

>

>

> The source of this commandment is G‑d's statement,;) "do not commit incest with your brother's wife."

>

>

> For this prohibition the punishment is kares if intentional, and a sin-offering if unintentional.

>

>

>

> Footnotes

>

>

>

> 1.

>

> Lev. 18:16.

Negative Commandment 345 (Digest)

Incest with a Wife's Sister

"And you shall not take a woman with her sister"—Leviticus 18:18.

It is forbidden to have incestuous relations with one's wife's sister—as long as the wife is alive [i.e., after her death, it is permitted to marry her sister].

Unabridged English Text of this Mitzvah »

« Close

> The 345th prohibition is that one is forbidden from having relations with one's wife's sister, during one's wife's lifetime.

>

>

> The source of this commandment is G‑d's statement,;) "do not marry a woman and [then take] her sister."

>

>

> For this prohibition the punishment is kares if intentional, and a sin-offering if unintentional.

>

>

>

> Footnotes

>

>

>

> 1.

>

> Lev. 18:18.

Courtesy of Chabad.org · Sefer Hamitzvot, Sichos in English

← Back to Shiurim · Daily study via Chabad.org