James 4:16

But, as it is, you boast of your proud pretensions. All such boasting is wicked.

1 Corinthians 5:6

Your ground for boasting about such a case is not good. Are you not aware that a little yeast will change the whole lump of dough?

1 Corinthians 4:7-8

For who makes you superior? And what do you have that you did not get from someone? But if you got it from someone, why do you boast as though you had not?

James 3:14

But if you cherish bitter jealousy and rivalry in your hearts, stop being proud of it and stop being false to the standard of truth.

Revelation 18:7

To the same degree in which she has lived in splendor and luxury, give her torture and tears. Because she is always boasting in her heart, 'I sit enthroned as queen; I am not a widow, I shall never experience any sorrow' --

Treasury of Scripture Knowledge

Summary

But now ye rejoice in your boastings: all such rejoicing is evil.

Bible References

General references

James 3:14
But if you cherish bitter jealousy and rivalry in your hearts, stop being proud of it and stop being false to the standard of truth.
1 Corinthians 4:7
For who makes you superior? And what do you have that you did not get from someone? But if you got it from someone, why do you boast as though you had not?
1 Corinthians 5:6
Your ground for boasting about such a case is not good. Are you not aware that a little yeast will change the whole lump of dough?
Revelation 18:7
To the same degree in which she has lived in splendor and luxury, give her torture and tears. Because she is always boasting in her heart, 'I sit enthroned as queen; I am not a widow, I shall never experience any sorrow' --