The Laws › Commandment #120
Commandment #120 · Positive · Family Laws

Set Apart for Each Other: The Commandment of Kiddushin

קִדּוּשִׁין
Source: Deuteronomy 24:1  ·  Maimonides, Sefer HaMitzvot, Positive #120

The Hebrew word for marriage — kiddushin — shares a root with holiness. To marry was to sanctify: to set a person apart from the rest of the world and consecrate them to one specific covenant. The Torah's commandment was not only to form a family, but to do so through a specific legal act — kiddushin, the sacred setting-apart that made a woman the exclusive covenant partner of her husband. This was not a contract between families. It was a consecration witnessed before God and the community.

Sanctification, Not Just Union

כִּי יִקַּח אִישׁ אִשָּׁה וּבְעָלָהּ וְהָיָה אִם לֹא תִמְצָא חֵן בְּעֵינָיו כִּי מָצָא בָהּ עֶרְוַת דָּבָר וְכָתַב לָהּ סֵפֶר כְּרִיתֻת וְנָתַן בְּיָדָהּ וְשִׁלְּחָהּ מִבֵּיתוֹ
"When a man hath taken a wife, and married her, and it come to pass that she find no favour in his eyes, because he hath found some uncleanness in her: then let him write her a bill of divorcement, and give it in her hand, and send her out of his house."

The Hebrew phrase "taken a wife" — lakach ishah — is the legal term for the formal act of betrothal. The word is precise. It is not "loved a woman" or "lived with a woman." It describes a transaction with legal weight: the man takes the woman into exclusive covenant through a specific act, in the presence of witnesses, with a specific declaration. She becomes mekudeshet — set apart, holy, consecrated to him.

The word kiddushin shares its root with kadosh — holiness, sanctification. Marriage in the Torah's framework was not a social contract between families or a romantic agreement between two individuals. It was a consecration — the setting apart of one person from the world and the dedicating of them to a specific covenant. The English word "marriage" barely carries this weight.

From the Garden — The Pattern This Law Would Eventually Name

עַל כֵּן יַעֲזָב אִישׁ אֶת אָבִיו וְאֶת אִמּוֹ וְדָבַק בְּאִשְׁתּוֹ וְהָיוּ לְבָשָׂר אֶחָד
"Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh."

The principle existed before the law had legal language for it. Adam's recognition of Eve — "This is now bone of my bones, and flesh of my flesh" (Genesis 2:23) — was followed immediately by the principle that has structured every marriage since: leaving, cleaving, becoming one flesh. Three actions, in sequence. The priority of the new bond over the parental bond. The physical and covenantal union.

Kiddushin is the formal legal enactment of exactly this pattern. A man who leaves his parental household to form a new primary bond, sealed by a consecration witnessed before God and the community. The law named and formalized what the garden had demonstrated.

Witnessed at the Gate — Boaz and Ruth

וַיֹּאמֶר בֹּעַז לַזְּקֵנִים וְכָל הָעָם עֵדִים אַתֶּם הַיּוֹם כִּי קָנִיתִי אֶת כָּל אֲשֶׁר לֶאֱלִימֶלֶךְ וְאֵת כָּל אֲשֶׁר לְכִלְיוֹן וּמַחְלוֹן מִיַּד נָעֳמִי
"And Boaz said unto the elders, and unto all the people, Ye are witnesses this day, that I have bought all that was Elimelech's, and all that was Chilion's and Mahlon's, of the hand of Naomi."

The gate of Bethlehem. Ten elders summoned as formal witnesses. A kinsman-redeemer transaction conducted publicly, with specific declarations. When Boaz announced his intent to take Ruth as his wife, the ten elders were not decorative — they were the required witnesses of a legal act. The people's blessing followed (Ruth 4:11-12): "The LORD make the woman that is come into thine house like Rachel and like Leah." What happened at the gate was kiddushin in practice: set apart, before witnesses, before God and the community, in full public view.

Malachi 2:14 calls God "witness between thee and the wife of thy youth" — the same witnessing principle that the gate ceremony enacted. The marriage was not private. The covenant was not secret. The community witnessed. God witnessed. And the obligation that followed was proportional to the publicity of the act.

Key Figures

*
Adam — Whose One-Flesh Union at Creation Became the Pattern Every Kiddushin Re-Enacts
Genesis 2:23-24 records the first recognition of covenant partnership: "bone of my bones, and flesh of my flesh," followed by the principle of leaving and cleaving. Every kiddushin ceremony since has been a formal re-enactment of this original pattern — the legal naming of what Adam's union at creation had already demonstrated.
+
Boaz — Who Performed Kiddushin Before Ten Witnesses at the Gate of Bethlehem
In Ruth 4:9-11, Boaz declared his intent before ten elders and all the people at the city gate, invoking formal witnesses for his acquisition of Ruth as his wife. The ceremony was public, deliberate, and witnessed — kiddushin in the form that the commandment required, conducted by a man who understood that the covenant he was entering demanded community witness.

Study Questions

For reflection and group study
The word kiddushin comes from the same root as kadosh (holy/set apart). What does naming marriage with the vocabulary of holiness and consecration communicate about the Torah's understanding of what marriage is? How does this framing differ from understanding marriage as primarily a social, economic, or romantic agreement?
Genesis 2:24 describes the man "leaving" his parents and "cleaving" to his wife — a reversal of the primary relational bond. In a world where family structures were the dominant social unit, what does the commandment to form a new primary bond communicate about the nature of the covenant established in kiddushin?
Kiddushin required specific elements: something of value given, a declaration spoken, witnesses present. What is the significance of each of these three elements? What would change about kiddushin if any one of the three were absent?
Malachi 2:14 describes God as "witness between thee and the wife of thy youth." What does having God as a named witness to the marriage covenant add to the obligations the covenant creates? How does divine witness differ from human witness in its implications?
Boaz performed his kiddushin at the city gate, in full public view, with ten elders as witnesses. The public nature of the covenant was not incidental — it was part of the act. What does the requirement for public, witnessed kiddushin suggest about the Torah's understanding of why marriage cannot be a private arrangement?

Kiddushin names the pattern established at creation — the leave-and-cleave of Genesis 2:24 formalized into a witnessed covenant act that Israel was commanded to perform.

Open Deuteronomy 24:1 in Torah Reader