Luke 12:19-20

and I will say to my soul: Soul, you have many good things laid up for many years; take your ease, eat, drink, be merry.

James 4:13-16

Come, now, you that say, Let us go to-day, or to-morrow, into this city, and remain there a year, and trade, and make gain;

2 Corinthians 6:2

(for he says: I have heard thee in an acceptable time, and in the day of salvation I have helped thee. Behold, now is the acceptable time; behold, now is the day of salvation:)

Treasury of Scripture Knowledge

Summary

Boast not thyself of to morrow; for thou knowest not what a day may bring forth.

General references

Bible References

Boast

Luke 12:19
and I will say to my soul: Soul, you have many good things laid up for many years; take your ease, eat, drink, be merry.
2 Corinthians 6:2
(for he says: I have heard thee in an acceptable time, and in the day of salvation I have helped thee. Behold, now is the acceptable time; behold, now is the day of salvation:)
James 4:13
Come, now, you that say, Let us go to-day, or to-morrow, into this city, and remain there a year, and trade, and make gain;

General references

James 4:16
But now you glory in your boastings: all such glorying is evil.