Specific deadline, as the eternal life of all creatures controlled by God
Specific deadline refers to the eternal life existing after death which never ends!
According to the Koran the specific deadline lies in the purpose of the universe:
We have only created Heaven and Earth and whatever lies between them for the truth and for a specific period, while disbelieve are dodging what they have been warranted about. (46:3)
Have they not refracted about themselves? God has only created Heaven and Earth and whatever lies in between them for the truth and till a Specific deadline.
Yet may men disbelieve about meeting their Lord. (30:8)
Anything you have is temporary, while God has is everlasting.(16:96)
There is nothing whose stores are not [controlled] by us, and we send it down only according to a fixed quantity. (15:21)
Sources :
"Recognition of Resurrection" (By Sayyed Mohammad Hossein Tehrani)