Simple answer:
Yes, but the important points are
"...for a few days..."
"...expensive limbs..." assuming this means good quality
Long tedious answer:
Bend a piece of wood and keep it bent and it will stay bent.
Longbow archers call this "following the string" which is why they un-string their bows.
* The same is true of all materials to a greater or lesser extent.
* Gets worse at higher temperature (so you can even bend glass).
* Gets worse at high humidity for materials that absorb moisture (like wood).
* Gets worse when temperature and/or humidity are cycled between extremes.
* Gets worse the longer you keep it bent.
Having said that, modern
recurve limb materials are very stable and will tolerate being held in compression for a few days...
compound limbs even more so. One of our club members has shot in a few Paralympics and reports that most archers keep their bows strung for a week or two during the games and to no ill effect...but keep them on the bow stands & away from extremes of temperature & humidity.
So don't leave bow strung up in back of car and park in the sun, garden shed, conservatory or sauna.
Experiment: if you have/borrow bow-scales, check that the poundage remains constant.
Also check for the string stretching: testing the bracing height before shooting.
I'd be nervous about the wooden cores though.
V