Today’s daf is sponsored by Rena Strauss in gratitude to Rabbanit Michelle Farber for enhancing my learning and in honor of completing Moed Katan.  One who switches from learning halakha to learning Torah or possibly also to learning Mishna or leaves the Talmud of Israel for the Talmud of Babylonia is considered a person who “has no peace” based on a translation of a verse in Zecharia 8:10. The Mishna categorizes certain mitzvot into ones that have no basis in verses in the Torah (annulling vows), ones that have a loose basis (Shabbat, Chagigah, and me'ila) and ones that are firmly based in the Torah. First, the Gemara brings a braita that disagrees regarding annulments of vows. Several verses are brought to show the foundation in the Torah. Then Shmuel also brings a verse and Rava raises questions against all the tanaim's verses but not against Shmuel. The Gemara then analyzes why Shabbat, Chagigah and me'ila all appear in the second category.