Reading the command of that, when first appointed to office, the Levites had to cut their hair, the Gemara taught that there were three who were required to cut their hair, and whose hair cutting was a religious duty: nazirites (as stated in ), those afflicted with skin disease (, "metzora", as stated in ), and the Levites. Citing the Mishnah, the Gemara taught that if any of them cut their hair without a razor, or left behind two hairs, their act was invalid.