Chagigah 18a and Chagigah 18b, sources for the prohibition of melachah on Hol HaMoed, and then the different levels of ritual purity, for washing hands, immersing hands, and immersing oneself.
Chagigah 18a and Chagigah 18b, sources for the prohibition of melachah on Hol HaMoed, and then the different levels of ritual purity, for washing hands, immersing hands, and immersing oneself.