Matthew 12:36-37

"I tell you that for every careless word that men speak they shall give account on the day of judgment.

Colossians 4:6

Let your speech be always gracious, with a savor of salt, and learn how to give every man a fitting answer.

1 Timothy 6:4-5

he is puffed up with conceit and knows nothing, but is doting about disputations and a strife of words. These give rise to envy, quarrels, railings, 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
"I tell you that for every careless word that men speak they shall give account on the day of judgment.
Colossians 4:6
Let your speech be always gracious, with a savor of salt, and learn how to give every man a fitting answer.
1 Timothy 6:4
he is puffed up with conceit and knows nothing, but is doting about disputations and a strife of words. These give rise to envy, quarrels, railings, evil suspicions,