Proverbs 17:27

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

James 1:19

This you know, my beloved brethren. But everyone must be quick to hear, slow to speak and slow to anger;

Proverbs 10:19

When there are many words, transgression is unavoidable,
But he who restrains his lips is wise.

Proverbs 14:29

He who is slow to anger has great understanding,
But he who is quick-tempered exalts folly.

Proverbs 15:28

The heart of the righteous ponders how 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 captures a city.

Ecclesiastes 9:17

The words of the wise heard in quietness are better than the shouting of a ruler among fools.

James 3:2

For we all stumble in many ways. If anyone does not stumble in what he says, he is a perfect man, able to bridle the whole body as well.

James 3:18

And the seed whose fruit is righteousness is sown in peace by 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
When there are many words, transgression is unavoidable,
But he who restrains his lips is wise.
Proverbs 15:28
The heart of the righteous ponders how to answer,
But the mouth of the wicked pours out evil things.
James 1:19
This you know, my beloved brethren. But everyone must be quick to hear, slow to speak and slow to anger;
James 3:2
For we all stumble in many ways. If anyone does not stumble in what he says, he is a perfect man, able to bridle the whole body as well.

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 captures a city.
Ecclesiastes 9:17
The words of the wise heard in quietness are better than the shouting of a ruler among fools.
James 3:18
And the seed whose fruit is righteousness is sown in peace by those who make peace.

General references

Proverbs 21:23
He who guards his mouth and his tongue,
Guards his soul from troubles.