Matthew 5:22
"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."
Cross References (ranked by relevance)
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.
To speak evil of no man, to be no brawlers, but gentle, shewing all meekness unto all men.
And fear not them which kill the body, but are not able to kill the soul: but rather fear him which is able to destroy both soul and body in hell.
So likewise shall my heavenly Father do also unto you, if ye from your hearts forgive not every one his brother their trespasses.
Be kindly affectioned one to another with brotherly love; in honour preferring one another;
Not rendering evil for evil, or railing for railing: but contrariwise blessing; knowing that ye are thereunto called, that ye should inherit a blessing.
Who, when he was reviled, reviled not again; when he suffered, he threatened not; but committed himself to him that judgeth righteously:
They compassed me about also with words of hatred; and fought against me without a cause.
Then came Peter to him, and said, Lord, how oft shall my brother sin against me, and I forgive him? till seven times?
Cease from anger, and forsake wrath: fret not thyself in any wise to do evil.
Then certain philosophers of the Epicureans, and of the Stoicks, encountered him. And some said, What will this babbler say? other some, He seemeth to be a setter forth of strange gods: because he preached unto them Jesus, and the resurrection.
Yet Michael the archangel, when contending with the devil he disputed about the body of Moses, durst not bring against him a railing accusation, but said, The Lord rebuke thee.
That no man go beyond and defraud his brother in any matter: because that the Lord is the avenger of all such, as we also have forewarned you and testified.
And the chief priests and all the council sought for witness against Jesus to put him to death; and found none.
Now the chief priests, and elders, and all the council, sought false witness against Jesus, to put him to death;
Then gathered the chief priests and the Pharisees a council, and said, What do we? for this man doeth many miracles.
For the poor shall never cease out of the land: therefore I command thee, saying, Thou shalt open thine hand wide unto thy brother, to thy poor, and to thy needy, in thy land.
For thy violence against thy brother Jacob shame shall cover thee, and thou shalt be cut off for ever.
If I have rewarded evil unto him that was at peace with me; (yea, I have delivered him that without cause is mine enemy:)
But I will forewarn you whom ye shall fear: Fear him, which after he hath killed hath power to cast into hell; yea, I say unto you, Fear him.