חגיגה
Tractate Chagigah
Mishnah Chagigah, the twenty-third and final tractate of Seder Moed, governs the pilgrimage offering and the degrees of ritual purity related to it. It has 3 chapters and 23 mishnayot.

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Chagigah – Chapter 1
Who is obligated in the pilgrimage offering, and those exempt from it.
Chagigah – Chapter 2
The degrees of ritual purity, and the debates on handwashing before eating.
Chagigah – Chapter 3
The laws of impurity affecting consecrated food and Temple vessels.
Talmud Bavli