Seven Laws

Law 5 of 7

Good Family Relationship

Do not engage in forbidden sexual relations.

Overview

The fifth Noahide Law establishes boundaries around human sexuality, protecting the sanctity of the family unit and the moral integrity of individuals and communities. These boundaries are not arbitrary — they reflect a divine design for human flourishing.

What It Prohibits

• Adultery — sexual relations with another person's spouse
• Incest — relations between close family members
• Relations with an animal (bestiality)
• Certain other forbidden unions as defined in halachic sources

Deeper Understanding

Human sexuality is one of the most powerful forces in human nature. The Torah channels this force within the bounds of committed, sanctified relationships — primarily marriage between a man and a woman. When these boundaries are violated, the result is harm: to individuals, to families, and to the broader social fabric.

The family is the foundational unit of civilization. Laws protecting it are therefore among the most essential for a healthy and just society. Rabbinic authorities discuss the extent of these prohibitions in detail in works such as The Divine Code.

Practical Observance

A Noahide is called to build family life on the foundation of faithfulness, commitment, and mutual respect. This means honoring the marriage bond, guarding personal conduct, and approaching intimacy with the dignity and sanctity it deserves.