Here are 6 Bible verses about unknown future from the Old and New Testaments of the Holy Bible (King James Version), sorted from most to least relevant.
Ecclesiastes 7:14 KJV
In the day of prosperity be joyful, but in the day of adversity consider: God also hath set the one over against the other, to the end that man should find nothing after him.
Ecclesiastes 1:11 KJV
There is no remembrance of former things; neither shall there be any remembrance of things that are to come with those that shall come after.
Ecclesiastes 3:22 KJV
Wherefore I perceive that there is nothing better, than that a man should rejoice in his own works; for that is his portion: for who shall bring him to see what shall be after him?
Ecclesiastes 8:7 KJV
For he knoweth not that which shall be: for who can tell him when it shall be?
Ecclesiastes 6:12 KJV
For who knoweth what is good for man in this life, all the days of his vain life which he spendeth as a shadow? for who can tell a man what shall be after him under the sun?
Ecclesiastes 10:14 KJV
A fool also is full of words: a man cannot tell what shall be; and what shall be after him, who can tell him?