Mark 10:11-12 (NIV)
He answered, “Anyone who divorces his wife and marries another woman commits adultery against her. 12 And if she divorces her husband and marries another man, she commits adultery.” 

1 Peter 3:7 (NLT)
In the same way, you husbands must give honor to your wives. Treat your wife with understanding as you live together. She may be weaker than you are, but she is your equal partner in God’s gift of new life. Treat her as you should so your prayers will not be hindered. 

Psalm 37:8 (NIV)
Refrain from anger and turn from wrath; do not fret—it leads only to evil. 

Proverbs 17:27 (NIV)
The one who has knowledge uses words with restraint, and whoever has understanding is even-tempered. 

Proverbs 21:23 (NIV)
Those who guard their mouths and their tongues keep themselves from calamity. 

Ecclesiastes 3:7 (NIV)
… a time to be silent and a time to speak, 

Ephesians 4:17-32 (NIV)
So I tell you this, and insist on it in the Lord, that you must no longer live as the Gentiles do, in the futility of their thinking. 18 They are darkened in their understanding and separated from the life of God because of the ignorance that is in them due to the hardening of their hearts. 19 Having lost all sensitivity, they have given themselves over to sensuality so as to indulge in every kind of impurity, and they are full of greed. 20 That, however, is not the way of life you learned 21 when you heard about Christ and were taught in him in accordance with the truth that is in Jesus. 22 You were taught, with regard to your former way of life, to put off your old self, which is being corrupted by its deceitful desires; 23 to be made new in the attitude of your minds; 24 and to put on the new self, created to be like God in true righteousness and holiness. 25 Therefore each of you must put off falsehood and speak truthfully to your neighbor, for we are all members of one body. 26 “In your anger do not sin”: Do not let the sun go down while you are still angry, 27 and do not give the devil a foothold. 28 Anyone who has been stealing must steal no longer, but must work, doing something useful with their own hands, that they may have something to share with those in need. 29 Do not let any unwholesome talk come out of your mouths, but only what is helpful for building others up according to their needs, that it may benefit those who listen. 30 And do not grieve the Holy Spirit of God, with whom you were sealed for the day of redemption. 31 Get rid of all bitterness, rage and anger, brawling and slander, along with every form of malice. 32 Be kind and compassionate to one another, forgiving each other, just as in Christ God forgave you. 

Proverbs 15:1-2 (NIV)
A gentle answer turns away wrath, but a harsh word stirs up anger. 2 The tongue of the wise adorns knowledge, but the mouth of the fool gushes folly.