Matthew 5:37 But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.
Matthew 12:35 A good man out of the good treasure of the heart bringeth forth good things: and an evil man out of the evil treasure bringeth forth evil things.
Matthew 12:36 But I say unto you, That every idle word that men shall speak, they shall give account thereof in the day of judgment.
Matthew 12:37 For by thy words thou shalt be justified, and by thy words thou shalt be condemned.
Ephesians 4:29 Let no corrupt communication proceed out of your mouth, but that which is good to the use of edifying, that it may minister grace unto the hearers.
Colossians 3:8 But now ye also put off all these; anger, wrath, malice, blasphemy, filthy communication out of your mouth.
Colossians 4:6 Let your speech [be] alway with grace, seasoned with salt, that ye may know how ye ought to answer every man.
James 5:12 But above all things, my brethren, swear not, neither by heaven, neither by the earth, neither by any other oath: but let your yea be yea; and [your] nay, nay; lest ye fall into condemnation.