Proverbs 17:27

He who spares his sayings knows knowledge, and a cool spirit is a man of understanding.

James 1:19

Understand [this], my dear brothers: every person must be quick to hear, slow to speak, slow to anger,

Proverbs 10:19

In many words, transgression is not lacking, but he who restrains his lips is prudent.

Proverbs 14:29

[He who is] slow to anger [has] great understanding, but the hasty of spirit exalts folly.

Proverbs 15:28

A heart of righteousness will ponder the answer, but a mouth of wickedness will pour out deceit.

Proverbs 16:32

He who is slow to anger [is] better than him who is mighty, and he who controls his spirit than him who captures a city.

Ecclesiastes 9:17

The words of the wise are heard in peace [more] than the shouting of a ruler [is heard] among the fools.

James 3:2

For we all stumble [in] many [ways]. If anyone does not stumble in what he says, he [is] a perfect individual, able to hold in check his whole body also.

James 3:18

And the fruit of righteousness is sown in peace among 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
In many words, transgression is not lacking, but he who restrains his lips is prudent.
Proverbs 15:28
A heart of righteousness will ponder the answer, but a mouth of wickedness will pour out deceit.
James 1:19
Understand [this], my dear brothers: every person must be quick to hear, slow to speak, 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 individual, able to hold in check his whole body also.

An excellent spirit

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

General references

Proverbs 21:23
He who guards his mouth and his tongue, he guards his life from danger.