James 4:16

But, as it is, you are constantly boasting presumptuously! All such boasting is wicked.

1 Corinthians 5:6

Your boasting is unseemly. Do not you know that even a little leaven leavens all the dough?

1 Corinthians 4:7-8

For who makes any one of you superior to others? And what have you that was not given you? But if you received it as a gift, why do you boast as if you had not?

James 3:14

But, while you harbor envy and bitterness and a spirit of rivalry in your hearts, do not boast or lie to the detriment of the Truth.

Revelation 18:7

for her self-glorification and her luxury, give her now an equal measure of torture and misery. In her heart she says 'I sit here a queen; no widow am I; I shall never know misery.'

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, while you harbor envy and bitterness and a spirit of rivalry in your hearts, do not boast or lie to the detriment of the Truth.
1 Corinthians 4:7
For who makes any one of you superior to others? And what have you that was not given you? But if you received it as a gift, why do you boast as if you had not?
1 Corinthians 5:6
Your boasting is unseemly. Do not you know that even a little leaven leavens all the dough?
Revelation 18:7
for her self-glorification and her luxury, give her now an equal measure of torture and misery. In her heart she says 'I sit here a queen; no widow am I; I shall never know misery.'