He wields no more authority in this house than I, and he has withheld nothing from me except yourself, since you are his wife. How then could I do this most wicked thing, and sin before God?”
English: “This great evil” — regarding illicit relations it is written “the great evil,” and regarding lashon hara it is written “a tongue that speaks great things,” teaching that whoever speaks lashon hara magnifies his sin to the scale of illicit relations.
On the daf / in context: The shared language of “great” equates the gravity of lashon hara with arayos.
Type of Learning
R’ Yishmael #2 — Gezerah shavah on גדולה / גדולות linking arayos and lashon hara.
What Is Learned
Lashon hara is ranked with the severity of giluy arayos.