Matthew 12:35

A good man from his good store produces good things, and a bad man from his bad store produces bad things.

Ephesians 4:29

Let no unwholesome words ever pass your lips, but let all your words be good for benefiting others according to the need of the moment, so that they may be a means of blessing to the hearers.

Colossians 4:6

Let your language be always seasoned with the salt of grace, so that you may know how to give every man a fitting answer.

Treasury of Scripture Knowledge

Summary

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

Bible References

General references

Matthew 12:35
A good man from his good store produces good things, and a bad man from his bad store produces bad things.
Ephesians 4:29
Let no unwholesome words ever pass your lips, but let all your words be good for benefiting others according to the need of the moment, so that they may be a means of blessing to the hearers.
Colossians 4:6
Let your language be always seasoned with the salt of grace, so that you may know how to give every man a fitting answer.