Matthew 12:34-37

34Offspring of vipers! how can ye speak good things, being wicked? For of the abundance of the heart the mouth speaks.

35The good man out of the good treasure brings forth good things; and the wicked man out of the wicked treasure brings forth wicked things.

36But I say unto you, that every idle word which men shall say, they shall render an account of it in judgment-day:

37for by thy words thou shalt be justified, and by thy words thou shalt be condemned.