Psalm 37:30

[The] mouth of [the] righteous utters wisdom, and his tongue speaks justice.

Psalm 71:15

My mouth will tell of your righteousness, your salvation {all day long}, though I do not know [the full] sum [of them].

Deuteronomy 6:7-9

And you shall recite them to your children, and you shall talk about them at [the time of] your living in your house and at [the time of] your going on the road and at [the time of] your lying down and at [the time of] your rising [up].

Psalm 71:24

My tongue also will speak of your righteousness all the day, because they have been put to shame, because they have been humiliated who seek my harm.

Proverbs 10:21

Lips of righteousness feed many, but fools {die for lack of sense}.

Proverbs 10:31

The mouth of the righteous brings forth wisdom, but a tongue of perversity will be cut off.

Proverbs 15:7

The lips of the wise will spread knowledge, but the heart of fools, not so.

Proverbs 25:11-13

Apples of gold in a setting of silver is a matter spoken at its proper time.

Proverbs 27:9

Perfume and incense will gladden a heart, and the pleasantness of one's friend [is] {personal advice}.

Matthew 12:35

The good person from his good treasury brings out good [things], and the evil person from his evil treasury brings out evil [things].

Ephesians 4:29

{No rotten word must proceed} from your mouth, but only something good for the building up of the need, in order that it may give grace to those who hear,

Colossians 4:6

Let your speech always [be] with grace, seasoned with salt, so that [you] may know how it is necessary for you to answer each one.

Treasury of Scripture Knowledge

Summary

The mouth of the righteous speaketh wisdom, and his tongue talketh of judgment.

Bible References

General references

Psalm 71:15
My mouth will tell of your righteousness, your salvation {all day long}, though I do not know [the full] sum [of them].
Deuteronomy 6:7
And you shall recite them to your children, and you shall talk about them at [the time of] your living in your house and at [the time of] your going on the road and at [the time of] your lying down and at [the time of] your rising [up].
Proverbs 10:21
Lips of righteousness feed many, but fools {die for lack of sense}.
Proverbs 15:7
The lips of the wise will spread knowledge, but the heart of fools, not so.
Proverbs 25:11
Apples of gold in a setting of silver is a matter spoken at its proper time.
Proverbs 27:9
Perfume and incense will gladden a heart, and the pleasantness of one's friend [is] {personal advice}.
Matthew 12:35
The good person from his good treasury brings out good [things], and the evil person from his evil treasury brings out evil [things].
Ephesians 4:29
{No rotten word must proceed} from your mouth, but only something good for the building up of the need, in order that it may give grace to those who hear,
Colossians 4:6
Let your speech always [be] with grace, seasoned with salt, so that [you] may know how it is necessary for you to answer each one.