Proverbs 17:27

He who has knowledge says little: and he who has a calm spirit is a man of good sense.

James 1:19

You have knowledge of this, dear brothers. But let every man be quick in hearing, slow in words, slow to get angry;

Proverbs 10:19

Where there is much talk there will be no end to sin, but he who keeps his mouth shut does wisely.

Proverbs 14:29

He who is slow to be angry has great good sense; but he whose spirit is over-quick gives support to what is foolish.

Proverbs 15:28

The heart of the upright gives thought to his answer; but from the mouth of the evil-doer comes a stream of evil things.

Proverbs 16:32

He who is slow to be angry is better than a man of war, and he who has control over his spirit than he who takes a town.

Ecclesiastes 9:17

The words of the wise which come quietly to the ear are noted more than the cry of a ruler among the foolish.

James 3:2

For we all go wrong in a number of things. If a man never makes a slip in his talk, then he is a complete man and able to keep all his body in control.

James 3:18

And the fruit of righteousness is planted in peace for 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
Where there is much talk there will be no end to sin, but he who keeps his mouth shut does wisely.
Proverbs 15:28
The heart of the upright gives thought to his answer; but from the mouth of the evil-doer comes a stream of evil things.
James 1:19
You have knowledge of this, dear brothers. But let every man be quick in hearing, slow in words, slow to get angry;
James 3:2
For we all go wrong in a number of things. If a man never makes a slip in his talk, then he is a complete man and able to keep all his body in control.

An excellent spirit

Proverbs 16:32
He who is slow to be angry is better than a man of war, and he who has control over his spirit than he who takes a town.
Ecclesiastes 9:17
The words of the wise which come quietly to the ear are noted more than the cry of a ruler among the foolish.
James 3:18
And the fruit of righteousness is planted in peace for those who make peace.

General references

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

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain