Matthew 12:36-37

But I tell you, That every idle word which men speak, for it shall they give an account in the day of judgment.

Colossians 4:6

Let your discourse be always gracious, seasoned with salt, that ye may know how ye ought to reply to every man.

1 Timothy 6:4-5

he is conceited, knowing nothing, but delirious with disputes and quarrels about words, from whence come wrath, contentions, evil speakings, wrong 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
But I tell you, That every idle word which men speak, for it shall they give an account in the day of judgment.
Colossians 4:6
Let your discourse be always gracious, seasoned with salt, that ye may know how ye ought to reply to every man.
1 Timothy 6:4
he is conceited, knowing nothing, but delirious with disputes and quarrels about words, from whence come wrath, contentions, evil speakings, wrong suspicions,