English: “Of which you shall not eat” — to include the slaughtered bird of the metzora.
On the daf / in context: The negative formulation supplies an additional source that creates both a positive and a negative commandment regarding the slaughtered bird of the metzora.
Type of Learning
Derash on the verse (Chullin) — the slaughtered metzora-bird is covered by a negative commandment as well.
What Is Learned
The slaughtered bird of the metzora is forbidden under both a positive and a negative commandment.