Ecclesiastes 10:3

And also, when he that is a fool Is walking in the way, his heart is lacking, And he hath said to every one, 'He is a fool.'

Proverbs 13:16

Every prudent one dealeth with knowledge, And a fool spreadeth out folly.

Proverbs 18:2

A fool delighteth not in understanding, But -- in uncovering his heart.

Proverbs 18:6

The lips of a fool enter into strife, And his mouth for stripes calleth.

Ecclesiastes 5:3

For the dream hath come by abundance of business, and the voice of a fool by abundance of words.

1 Peter 4:4

in which they think it strange -- your not running with them to the same excess of dissoluteness, speaking evil,

Treasury of Scripture Knowledge

Summary

Yea also, when he that is a fool walketh by the way, his wisdom faileth him, and he saith to every one that he is a fool.

Bible References

And he

Ecclesiastes 5:3
For the dream hath come by abundance of business, and the voice of a fool by abundance of words.
Proverbs 13:16
Every prudent one dealeth with knowledge, And a fool spreadeth out folly.
Proverbs 18:2
A fool delighteth not in understanding, But -- in uncovering his heart.
1 Peter 4:4
in which they think it strange -- your not running with them to the same excess of dissoluteness, speaking evil,

General references

1 Kings 12:8
And he forsaketh the counsel of the elders which they counselled him, and consulteth with the lads who have grown up with him, who are standing before him;
Proverbs 14:33
In the heart of the intelligent wisdom doth rest. And in the midst of fools it is known.
Proverbs 17:28
Even a fool keeping silence is reckoned wise, He who is shutting his lips intelligent!