Ecclesiastes 3:22

3:22 So I perceived there is nothing better than for people to enjoy their work,

because that is their reward;

for who can show them what the future holds?

Ecclesiastes 6:12

6:12 For no one knows what is best for a person during his life –

during the few days of his fleeting life –

for they pass away like a shadow.

Nor can anyone tell him what the future will hold for him on earth.

Ecclesiastes 8:7

8:7 Surely no one knows the future,

and no one can tell another person what will happen.

James 4:13-14

4:13 Come now, you who say, “Today or tomorrow we will go into this or that town and spend a year there and do business and make a profit.” 4:14 You do not know about tomorrow. What is your life like? For you are a puff of smoke that appears for a short time and then vanishes.