And you shall keep the festival of Shavuos to Hashem your God, with a tribute of a freewill offering of your hand, which you shall give according as Hashem your God blesses you.
English: "With a tribute of a freewill offering of your hand" — "tribute" teaches that a person brings his obligatory offerings from ordinary (chullin) funds.
On the daf / in context: Festival obligations must be discharged with money that is not ma’aser sheni; the word "misas" implies a levy from one’s own ordinary resources.
Type of Learning
Derash on the verse (Chagigah) — obligatory offerings come from chullin.
What Is Learned
Festival offerings that are obligatory must be purchased with ordinary money, not with ma’aser-sheni funds.