lay aside for

lay aside (something) for (someone or something)

To save or keep something in reserve for someone or for a future use. The first noun or pronoun can also be used between "lay" and "aside." You should lay aside part of each paycheck for your retirement fund. We should lay some lunch aside for Jerry, I'm sure he'll be hungry when he gets home.
See also: aside, lay
Farlex Dictionary of Idioms.

lay something aside for someone or something

to put something aside, in reserve, for someone or something. I laid some cake aside for Tom, but someone else got it. I laid aside some cake for Tom.
See also: aside, lay
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • lay aside (something) for (someone or something)
  • lie by
  • lay over
  • lay back
  • lie back
  • lay aside
  • lay (something) on (someone or something)
  • lay on
  • lay something on someone
  • lay away
References in classic literature
Mary offered to lend the little she possessed; but my mother declined it, saying that we must begin on an economical plan; and she hoped that the whole or part of mine, added to what we could get by the sale of the furniture, and what little our dear papa had contrived to lay aside for her since the debts were paid, would be sufficient to last us till Christmas; when, it was hoped, something would accrue from our united labours.
Agnes Grey