Men, base fellows, have gone out from your midst and have led astray the inhabitants of their city, saying, “Let us go and serve other gods” that you have not known.
English: “Saying” — this teaches that witnesses and formal warning are required for each and every one of them.
On the daf / in context: The word “leimor” indicates that the seductive speech itself must be attested by witnesses and preceded by hatra’ah for each individual seducer.
Type of Learning
Derash on the verse (Sanhedrin) — each seducer needs his own witnesses and warning.
What Is Learned
Each of the seducers of an ir ha-nidachas must be warned and attested by witnesses individually.