Sefer HaMitzvos

מצות לא תעשה של״ו, של״ה, של״ז–של״ט

Day 88 of 339

Negative Mitzvah 336

Prohibition against marriage with one's daughter

It is forbidden to take your daughter as a wife.

(This Negative Mitzvah is not explicitly mentioned in the Torah because it is considered to be self-understood.

If you are not allowed to marry your granddaughter, then, of course, you will not be allowed to marry your daughter.)

Negative Mitzvah 335

Prohibition against marriage with one's daughter's daughter

Leviticus 18:10 "Do not act immodestly with your granddaughter"

It is forbidden to take your daughter's daughter as a wife (Your granddaughter born to your daughter and her husband).

Negative Mitzvah 337

Prohibition against marriage with a woman and her daughter

Leviticus 18:17 "Do not act immodestly with a woman and her daughter"

It is forbidden to take both a woman and her daughter as wives.

Negative Mitzvah 338

Prohibition against marriage with a woman and her son's daughter

Leviticus 18:17 "You may not take her son's daughter"

It is forbidden to take a woman as a wife when you are already married to her father's mother (her paternal grandmother).

The opposite is also true.

It is forbidden to take your wife's father's mother as a wife.

Negative Mitzvah 339

Prohibition against marriage with a woman and her daughter's daughter

Leviticus 18:17 "You may not take her daughter's daughter"

It is forbidden to take a woman as a wife when you are already married to her mother's mother (her maternal grandmother).

The opposite is also true. It is forbidden to take your wife's mother's mother as a wife.