If you have workflow you could use set item permissions and some kind of pause I guess - what happens to the item in that 24 hours?
In nintex form, user is filling the data and saving to the list. so, there are some approvals to happen in that 24 hours, so user should not submit the form in that 24hours from the time of submission.
yes. my requirement is,
i will submit the form for the first time, then it should save in the list.
next if i submit the form again within 24 hours then form should not get saved, it should show error message please submit the form after 24 hours like this
based on what you've said here, it seems like your requirement is that the user should not be able to resubmit prior to approvals / rejections - not just "for 24 hours."
in which case i'd suggest using a workflow - once the item is submitted, lock it down for only the admin (or whoever is doing approvals), and unlock it once approved. You could even hide the submit button to the initiator, or hide an entire panel, or remove their permissions entirely. Lots of options.
It will go for approval, but user needs the validation in the form itself so that 2nd time if user tries to submit it should not get submitted