Proverbs 27:1

Do not boast {about tomorrow}, for you do not know what the day will bring.

Luke 12:19-20

And I will say to my soul, "Soul, you have many possessions stored up for many years. Relax, eat, drink, celebrate!" '

James 4:13-16

Come now, you who say, "Today or tomorrow we will travel to such and such a city and spend a year there, and carry on business and make a profit,"

1 Samuel 28:19

And Yahweh will also give Israel with you into the hands of [the] Philistines, and tomorrow you and your sons [will be] with me, and Yahweh will also give the army of Israel into [the] hand of [the] Philistines."

Psalm 95:7

For he [is] our God, and we [are] the people of his pasture and the sheep of his hand. {Today} if you will hear his voice:

Isaiah 56:12

"Come, let me take wine, and let us carouse [with] intoxicating drink, and tomorrow will be like today, {very great indeed}."

2 Corinthians 6:2

For he says, "At the acceptable time I heard you, and in the day of salvation I helped you." 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.

Bible References

Boast

Psalm 95:7
For he [is] our God, and we [are] the people of his pasture and the sheep of his hand. {Today} if you will hear his voice:
Isaiah 56:12
"Come, let me take wine, and let us carouse [with] intoxicating drink, and tomorrow will be like today, {very great indeed}."
Luke 12:19
And I will say to my soul, "Soul, you have many possessions stored up for many years. Relax, eat, drink, celebrate!" '
2 Corinthians 6:2
For he says, "At the acceptable time I heard you, and in the day of salvation I helped you." Behold, now [is] the acceptable time; behold, now [is] the day of salvation!
James 4:13
Come now, you who say, "Today or tomorrow we will travel to such and such a city and spend a year there, and carry on business and make a profit,"

Thou

1 Samuel 28:19
And Yahweh will also give Israel with you into the hands of [the] Philistines, and tomorrow you and your sons [will be] with me, and Yahweh will also give the army of Israel into [the] hand of [the] Philistines."

General references

Leviticus 8:32
but the remainder of the meat and the bread you must burn in the fire.
Proverbs 3:28
Do not say to your neighbor, "Go and return and tomorrow I will give [it]," {when it is with you}.
James 4:16
But now you boast in your arrogance. All such boasting is evil.