Job 31:30
(For I did not let my mouth give way to sin, in putting a curse on his life;)
Romans 12:14
Give blessing and not curses to those who are cruel to you.
Exodus 23:4-5
If you come across the ox or the ass of one who is no friend to you wandering from its way, you are to take it back to him
Ecclesiastes 5:2
Be not unwise with your mouth, and let not your heart be quick to say anything before God, because God is in heaven and you are on the earth--so let not the number of your words be great.
Ecclesiastes 5:6
Let not your mouth make your flesh do evil. And say not before the angel, It was an error. So that God may not be angry with your words and put an end to the work of your hands.
Matthew 5:22
But I say to you that everyone who is angry with his brother will be in danger of being judged; and he who says to his brother, Raca, will be in danger from the Sanhedrin; and whoever says, You foolish one, will be in danger of the hell of fire.
Matthew 5:43-44
You have knowledge that it was said, Have love for your neighbour, and hate for him who is against you:
Matthew 12:36
And I say to you that in the day when they are judged, men will have to give an account of every foolish word they have said.
James 3:6
And the tongue is a fire; it is the power of evil placed in our bodies, making all the body unclean, putting the wheel of life on fire, and getting its fire from hell.
James 3:9-10
With it we give praise to our Lord and Father; and with it we put a curse on men who are made in God's image.
1 Peter 2:22-23
Who did no evil, and there was no deceit in his mouth:
1 Peter 3:9
Not giving back evil for evil, or curse for curse, but in place of cursing, blessing; because this is the purpose of God for you that you may have a heritage of blessing.