Today's daf is sponsored by Helen Danczak in memory of her beloved mother on her 28th yahrzeit. "Her love of family is a guiding force for me."

Today's daf is sponsored by Debbie and Yossi Gevir on the birth of two new grandchildren. "With joy and gratitude to Hashem! Mazal Tov to our beloved children Elazar and Sarah on the birth, two months ago. of their daughter, Shaked Tova. And to our beloved children Eliav and Noya, upon the birth of their son Ofek Shalom, whose Brit was yesterday. שירבו שמחות בישראל!

A contradiction is brought between a braita and the Mishna regarding the language "I take an oath that I will eat." This contradiction is resolved in two different ways.

A braita explains what "mivta" is and what "isar" is. They are both languages of oaths. But an isar can be liable a sacrifice and also not necessarily. The meaning of this braita is a subject of debate between Abaye and Rava who disagree about whether isar is a language of being matpis on an oath or not.

Rav Dimi explains in the name of Rabbi Yochanan what negative commandments are transgressed by different types of oath of expression (past and future) and for vows. He explains that oaths about something that one will do in the future are "false oaths" and in the past are "vain oaths." However, there is a braita that says that false and vain oaths are the same. How can this braita be explained in light of Rav Dimi's statement?