Proverbs 17:27

He who spares his words has knowledge, and he who is of a cool spirit is a man of understanding.

James 1:19

Therefore, my beloved brothers, let every man be swift to hear, slow to speak, slow to wrath.

Proverbs 10:19

Transgression is not lacking in the multitude of words, but he who refrains his lips does wisely.

Proverbs 14:29

He who is slow to anger is of great understanding, but he who is hasty of spirit exalts folly.

Proverbs 15:28

The heart of a righteous man meditates to answer, but the mouth of the wicked pours out evil things.

Proverbs 16:32

He who is slow to anger is better than the mighty, and he who rules his spirit, than he who takes a city.

Ecclesiastes 9:17

The words of the wise heard in quiet are better than the cry of him who rules among fools.

James 3:2

For we all stumble in many things. If any man does not stumble in word, this is a perfect man, able also to bridle the whole body.

James 3:18

And the fruit of righteousness is sown in peace to those who make peace.

Treasury of Scripture Knowledge

Summary

He that hath knowledge spareth his words: and a man of understanding is of an excellent spirit.

General references

Bible References

Spareth

Proverbs 10:19
Transgression is not lacking in the multitude of words, but he who refrains his lips does wisely.
Proverbs 15:28
The heart of a righteous man meditates to answer, but the mouth of the wicked pours out evil things.
James 1:19
Therefore, my beloved brothers, let every man be swift to hear, slow to speak, slow to wrath.
James 3:2
For we all stumble in many things. If any man does not stumble in word, this is a perfect man, able also to bridle the whole body.

An excellent spirit

Proverbs 16:32
He who is slow to anger is better than the mighty, and he who rules his spirit, than he who takes a city.
Ecclesiastes 9:17
The words of the wise heard in quiet are better than the cry of him who rules among fools.
James 3:18
And the fruit of righteousness is sown in peace to those who make peace.

General references

Proverbs 21:23
He who keeps his mouth and his tongue keeps his soul from troubles.