In its primary meaning, the Hebrew word mitzvah (/ˈmɪtsvə/; meaning "commandment", מִצְוָה, [mit͡sˈva], Biblical: miṣwah; plural מִצְווֹת mitzvot [mit͡sˈvot], Biblical: miṣwoth; from צִוָּה ṣiwwah "command") refers to precepts and commandments commanded by God.

It is used in rabbinical Judaism to refer to the 613 commandments given in the Torah at biblical Mount Sinai and the seven rabbinic commandments instituted later for a total of 620. The 613 commandments are divided into two categories: 365 negative commandments and 248 positive commandments. According to the Talmud, all moral laws are, or are derived from, divine commandments.

The opinions of the Talmudic rabbis are divided between those who seek the purpose of the mitzvot and those who do not question them. The latter argue that if the reason for each mitzvah could be determined, people might try to achieve what they see as the purpose of the mitzvah, without actually performing the mitzvah itself (lishmah), which would become self-defeating. The former believe that people were to understand the reason and the purpose for each mitzvah, it would actually help them to observe and perform the mitzvah (some mitzvot are given reasons in the Torah).