Parashas Acharei Mos · Passuk 18:10
Chabad.org — English translation + Rashi
Torah Temima points to Sanhedrin 76a.
English: “Or your daughter’s daughter” — a fortiori one’s own daughter; yet we do not punish from a kal va-chomer — the verse merely clarifies the matter.
Daughter implied, not punished from logic alone
The daughter is forbidden, but the penalty structure rests on explicit verses, not solely on logical inference.