Matthew 12:36-37

I tell you, men will have to account on the day of judgment for every light word they utter;

Colossians 4:6

let your talk always have a saving salt of grace about it, and learn how to answer any question put to you.

1 Timothy 6:4-5

is a conceited, ignorant creature, with a morbid passion for controversy and argument which only leads to envy, dissension, insults, insinuations,

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, men will have to account on the day of judgment for every light word they utter;
Colossians 4:6
let your talk always have a saving salt of grace about it, and learn how to answer any question put to you.
1 Timothy 6:4
is a conceited, ignorant creature, with a morbid passion for controversy and argument which only leads to envy, dissension, insults, insinuations,