>>10720821Jonah's three-day stay in the belly of the great fish was said to be "forever" (olam) (Jonah 2:6). Forever lasted for 3 days!
Jonah 2:6 King James Version
6 I went down to the bottoms of the mountains; the earth with her bars was about me for ever: yet hast thou brought up my life from corruption, O Lord my God.
In all of the above verses, the inspired writers used the word olam to refer to things that most Christians would concede were of limited duration rather than things of literally "eternal" or "everlasting" duration. Both promised temporal blessings and threatened temporal punishments are referred to as being olam (of an indefinite, "hidden" duration of time).