sleep on something, to

sleep on something

Consider something overnight before deciding, as in I don't know if I want to go on such a long hike; let me sleep on it. This usage was first recorded in 1519 in the state papers of King Henry VIII: "His Grace ... said that he would sleep and dream upon the matter."
See also: on, sleep, something
The American Heritage® Dictionary of Idioms by Christine Ammer.

sleep on something, to

To postpone a decision until the next day. Both the idea and the expression are very old. The State Papers of HenryVIII (1519) by an unknown compiler stated, “His Grace . . . sayd thatt he wold slepe and drem upon the matter.”
See also: on, sleep
The Dictionary of Clichés by Christine Ammer
See also:
  • back into
  • back into (someone or something)
  • back up to
  • back (someone or something) up to (something)
  • bring (something) with
  • bring with
  • bear off from (someone or something)
  • bear down
  • back onto
  • back onto (something)