Job 31:30
Neither have I suffered my mouth to sin by wishing a curse to his soul.
Romans 12:14
Bless them who persecute you; bless, and curse not.
Exodus 23:4-5
If thou shalt meet thy enemy's ox or his ass going astray, thou shalt surely bring it back to him again.
Ecclesiastes 5:2
Be not rash with thy mouth, and let not thy heart be hasty to utter any thing before God: for God is in heaven, and thou upon earth: therefore let thy words be few.
Ecclesiastes 5:6
Suffer not thy mouth to cause thy flesh to sin; neither say thou before the angel, that it was an error: why should God be angry at thy voice, and destroy the work of thy hands?
Matthew 5:22
But I say to you, That whoever is angry with his brother without a cause, shall be in danger of the judgment: and whoever shall say to his brother, Raca, shall be in danger of the council: but whoever shall say, Thou fool, shall be in danger of hell-fire.
Matthew 5:43-44
Ye have heard that it hath been said, Thou shalt love thy neighbor, and hate thy enemy:
Matthew 12:36
But I say to you, That for every idle word that men shall speak, they shall give account in the day of judgment.
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 from hell.
James 3:9-10
With this we bless God, even the Father; and with this we curse men, who are made after the similitude of God.
1 Peter 2:22-23
Who committed no sin, neither was guile found in his mouth:
1 Peter 3:9
Not rendering evil for evil, or railing for railing: but on the contrary, blessing; knowing that ye are called to this, that ye should inherit a blessing.