James 3:6
"And the tongue is a fire, a world of iniquity: so is the tongue among our members, that it defileth the whole body, and setteth on fire the course of nature; and it is set on fire of hell."
Cross References (ranked by relevance)
An ungodly man diggeth up evil: and in his lips there is as a burning fire.
There is nothing from without a man, that entering into him can defile him: but the things which come out of him, those are they that defile the man.
A soft answer turneth away wrath: but grievous words stir up anger.
And he cried and said, Father Abraham, have mercy on me, and send Lazarus, that he may dip the tip of his finger in water, and cool my tongue; for I am tormented in this flame.
They have sharpened their tongues like a serpent; adders’ poison is under their lips. Selah.
A false witness that speaketh lies, and he that soweth discord among brethren.
Who whet their tongue like a sword, and bend their bows to shoot their arrows, even bitter words:
Do not they blaspheme that worthy name by the which ye are called?
But Peter said, Ananias, why hath Satan filled thine heart to lie to the Holy Ghost, and to keep back part of the price of the land?
And set up false witnesses, which said, This man ceaseth not to speak blasphemous words against this holy place, and the law:
And deceiveth them that dwell on the earth by the means of those miracles which he had power to do in the sight of the beast; saying to them that dwell on the earth, that they should make an image to the beast, which had the wound by a sword, and did live.
Whose mouths must be stopped, who subvert whole houses, teaching things which they ought not, for filthy lucre’s sake.
But when the Pharisees heard it, they said, This fellow doth not cast out devils, but by Beelzebub the prince of the devils.
Knowing this first, that there shall come in the last days scoffers, walking after their own lusts,
Behold, the name of the LORD cometh from far, burning with his anger, and the burden thereof is heavy: his lips are full of indignation, and his tongue as a devouring fire:
But I say unto you, That whosoever is angry with his brother without a cause shall be in danger of the judgment: and whosoever shall say to his brother, Raca, shall be in danger of the council: but whosoever shall say, Thou fool, shall be in danger of hell fire.
Also of your own selves shall men arise, speaking perverse things, to draw away disciples after them.
For I heard the defaming of many, fear on every side. Report, say they, and we will report it. All my familiars watched for my halting, saying, Peradventure he will be enticed, and we shall prevail against him, and we shall take our revenge on him.
Therefore thus saith the LORD; Behold, I will cast thee from off the face of the earth: this year thou shalt die, because thou hast taught rebellion against the LORD.
And the beast was taken, and with him the false prophet that wrought miracles before him, with which he deceived them that had received the mark of the beast, and them that worshipped his image. These both were cast alive into a lake of fire burning with brimstone.