ask of

ask (something) of

To request something of another person. I hope she doesn't ask that of me—I'm afraid I won't be able to say no. I'm sorry, but I'm not sure. Ask those questions of the boss.
See also: ask, of
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

ask something of someone or something

to request or demand something from someone, something, or a group. I want to ask something of you. We will ask that of the board of directors. You should ask that of your database.
See also: ask, of
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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References in classic literature ?
This chance did, then, for him at once more than he would have dared to ask of Providence.
Render to him, then, the last service he can by any possibility ask of you, and your work will be all the more meritorious."
Major days are like poetry Hanging in the air I ask for honour, I ask for cherish, I ask for proud, I ask of you.
Perhaps unblinking honesty is too much to ask of IVF's early adopters, who are breaking sacred taboos even while conforming to norms of the nuclear family.
The question asked of Elijah is the one we ask of ourselves whenever trouble has reached a fever pitch: What on earth am I doing?
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