To marry a wife by the means prescribed in the Torah (kiddushin)

This mitzvah commands a man to marry a woman through kiddushin — the Torah’s prescribed method of establishing marriage. Marriage in halacha is not merely a social contract but a sanctification, creating a holy bond between husband and wife. Kiddushin can be effected through money, a written document, or intimacy, though the sages instituted that it should be performed with a ring under the chuppah. This sanctification elevates the relationship into a covenant under Hashem, ensuring the Jewish home is founded on holiness.

Commentary & Classical Explanation:

• Rambam (Hilchot Ishut 1:1): From the time of Moshe Rabbeinu, marriages are sanctified through kiddushin before entering nisuin (full marriage).
• Sefer HaChinuch (Mitzvah 552): The root is to establish family life in purity and holiness, ensuring Jewish continuity through proper unions.
• Talmud (Kiddushin 2a): Defines the three halachic methods of effecting kiddushin, with rabbinic practice focusing on giving an object of value before witnesses.