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 you meet your enemy's ox or his donkey going astray, you shall surely bring it back to him again.
Ecclesiastes 5:2
Be not rash with your mouth, and let not your heart be hasty to utter anything before God: for God is in heaven, and you upon earth: therefore let your words be few.
Ecclesiastes 5:6
Permit not your mouth to cause your flesh to sin; neither say before the angel, that it was an error: why should God be angry at your voice, and destroy the work of your hands?
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, You fool, shall be in danger of hell fire.
Matthew 5:43-44
You have heard that it has been said, You shall love your neighbor, and hate your enemy.
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.
James 3:6
And the tongue is a fire, a world of iniquity: so is the tongue among our members, that it defiles the whole body, and sets on fire the course of nature; and it is set on fire by hell.
James 3:9-10
With this bless we God, even the Father; and with this curse we men, who are made after the similitude of God.
1 Peter 2:22-23
Who did 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 you are unto this called, that you should inherit a blessing.