Ecclesiastes 10:3

Yes also, in the way a fool walks, his heart fails; and he says to all that he is a fool.

Proverbs 13:16

Every wise one deals with knowledge, but a fool lays open his folly.

Proverbs 18:2

A fool has no delight in understanding, but only that his heart may lay itself bare.

Proverbs 18:6

A fool's lips enter into argument, and his mouth calls for strokes.

Ecclesiastes 5:3

For a dream comes through the multitude of business; and a fool's voice by the multitude of words.

1 Peter 4:4

In these things they are surprised, that you are not running with them into the same excess of riot, blaspheming.

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 a dream comes through the multitude of business; and a fool's voice by the multitude of words.
Proverbs 13:16
Every wise one deals with knowledge, but a fool lays open his folly.
Proverbs 18:2
A fool has no delight in understanding, but only that his heart may lay itself bare.
1 Peter 4:4
In these things they are surprised, that you are not running with them into the same excess of riot, blaspheming.

General references

1 Kings 12:8
But he left the counsel of the old men which they had advised him, and talked with the young men who had grown up with him, who stood before him.
Proverbs 14:33
Wisdom rests in the heart of him who has understanding, but among fools it is made known.
Proverbs 17:28
Even a fool, when he is silent, is counted wise, and he who shuts his lips is counted as a man of understanding.