149

Not to have sexual relations with your father's sister

The Luchos - Ten Commandments
עֶרְוַ֥ת אֲחוֹת־אָבִ֖יךָ לֹ֣א תְגַלֵּ֑ה שְׁאֵ֥ר אָבִ֖יךָ הִֽוא׃ - פָּרָשַׁת אַחֲרֵי מוֹת
Leviticus 18:12 - "You shall not uncover the nakedness of your father's sister; she is the close relative of your father."

This Mitzvah's Summary

מִצְוָה עֲשֵׂה - Positive Commandment
מִצְוָה לֹא תַעֲשֶׂה - Negative Commandment
Family – מִשְׁפָּחָה

Forbidden to have sexual relations with one’s father’s sister.

This mitzvah prohibits intimacy with one’s paternal aunt. The Torah emphasizes that she is the she’er (close relative) of one’s father, highlighting the deep familial bond that must remain inviolate. Such an act falls under the category of arayot (forbidden unions), carrying severe punishment and undermining the dignity and purity of the family structure.

Commentary & Classical Explanation:

  • Rambam (Hilchot Issurei Bi’ah 2:10): Clearly forbids sexual relations with one’s father’s sister as part of the core incest laws.
  • Sefer HaChinuch (Mitzvah 198): The root is to preserve holiness within the family, prevent disgraceful confusion of roles, and uphold respect for close kinship.
  • Talmud (Sanhedrin 76a): Details the gravity of intimacy with an aunt, equating it with other core prohibitions in the arayot.
(Source: Chabad.org)

Applying this Mitzvah Today

Notes on this Mitzvah's Fundamentals

This Mitzvah's Fundamental Badges

Holiness - קְדֻשָּׁה

Information Icon

Represents the concept of  spiritual intentionality, purity, and sanctity—set apart for a higher purpose.

View Badge →

Reverence - יִרְאַת שָׁמַיִם

Information Icon

Signifies awe and reverence toward Hashem—living with awareness of His greatness and presence.

View Badge →

Between a person and G-d - בֵּין אָדָם לְמָקוֹם

Information Icon

Mitzvot that define and deepen the relationship between a person and their Creator. These include commandments involving belief, prayer, Shabbat, festivals, sacrifices, and personal holiness — acts rooted in divine connection rather than human interaction.

View Badge →
Mitzvah Minute
Mitzvah Minute Logo

Learn more.

Dive into mitzvot, prayer, and Torah study—each section curated to help you learn, reflect, and live with intention. New insights are added regularly, creating an evolving space for spiritual growth.

Luchos
Live a commandment-driven life

Mitzvah

Explore the 613 mitzvot and uncover the meaning behind each one. Discover practical ways to integrate them into your daily life with insights, sources, and guided reflection.

Learn more

Mitzvah #

413

A permanent or temporary [non-Jewish] hired worker must not eat from it
The Luchos - Ten Commandments
Learn this Mitzvah

Mitzvah Highlight

Siddur
Connection through Davening

Tefillah

Learn the structure, depth, and spiritual intent behind Jewish prayer. Dive into morning blessings, Shema, Amidah, and more—with tools to enrich your daily connection.

Learn more

Tefillah

Tefillah sub-header
A Siddur
Learn this Tefillah

Tefillah Focus

A Sefer Torah
Study the weekly Torah portion

Parsha

Each week’s parsha offers timeless wisdom and modern relevance. Explore summaries, key themes, and mitzvah connections to deepen your understanding of the Torah cycle.

Learn more

וְזֹאת הַבְּרָכָה - V'Zot HaBerachah

Haftarah: Joshua, 1:1–18
A Sefer Torah
Learn this Parsha

Weekly Parsha