The People Under the Stairs1991

Fool:
[after Roach rescues him from "Daddy"] Thanks.

Roach:
[smiles and nods]

Fool:
[to Alice] He doesn't talk much, does he?

Alice:
His tongue's cut out.

Roach:
[opens his mouth and shows a severed stump]

Alice:
Mommy caught him trying to call for help one day, and Daddy had to teach him to...

Fool:
Speak no evil, right?

Alice:
[nods]

Fool:
Your father's one sick mother, you know that? Actually, your mother's one sick mother, too!

Alice:
Shhh! You're speaking evil! They'd kill you if they heard a word you just said.