Proverbs 27:1

27:1 Do not boast about tomorrow;

for you do not know what a day may bring forth.

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.