believe of

believe (something) of (someone)

To accept that a statement about someone is true. I can't believe these lies of Cheryl—I have always known her to be a very reputable businesswoman.
See also: believe, of
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

believe something of someone

to accept a statement about someone as truth. What a terrible thing for Jill to do. I can't believe it of her. I can believe anything of Max. He's such a conniving person.
See also: believe, of
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
Hence, I may have sufficient reason to believe of a set of propositions that I respectively had (and possibly still have), have or will have sufficient reason to believe it.
In other words, let it be the case that I presently have sufficient reason to believe of a particular P-relevant set of propositions E* and a particular time t* that (E**) (1) I have sufficient reason to believe that E* at t*,