("Ritual Baths"). Sixth tractate of Order
Tohorot in the Mishnah. Its ten chapters deal with the laws of building a ritual bath (
Mikveh) and of immersion (Lev. 11:36, 15:16). Included are the dimensions of a ritual bath, proper immersion, causes for disqualification of a
mikveh, the use of springs, rivers, and seas as ritual baths, and the utensils that require immersion in a
mikveh. According to Jewish law, contact with all forms of impurity, from the most severe to the mildest, requires immersion. The subject is amplified in the
Tosefta.