Matthew 12:36-37

And I say to you, a person will [have to] give an account [to God] on the day of judgment for every careless word he had spoken [while on earth].

Colossians 4:6

Your speech should always be favorable, seasoned with salt [i.e., interesting and appropriate], so that you may know how to properly answer each person [you talk with].

1 Timothy 6:4-5

that person is conceited. He does not understand anything, but has an unhealthy concern for controversy and arguments over words, which produce envy, dissension, abusive language, evil suspicions,

Treasury of Scripture Knowledge

Summary

Should he reason with unprofitable talk? or with speeches wherewith he can do no good?

Bible References

He reason

Matthew 12:36
And I say to you, a person will [have to] give an account [to God] on the day of judgment for every careless word he had spoken [while on earth].
Colossians 4:6
Your speech should always be favorable, seasoned with salt [i.e., interesting and appropriate], so that you may know how to properly answer each person [you talk with].
1 Timothy 6:4
that person is conceited. He does not understand anything, but has an unhealthy concern for controversy and arguments over words, which produce envy, dissension, abusive language, evil suspicions,