All of the following quotes are from the Book of Proverbs, the New Living Translation. 

Controlling Your Tongue 

1. ^18:20A man’s belly shall be satisfied with the fruit of his mouth; and with the increase of his lips shall he be filled.
2. ^17:20He … that hath a perverse tongue falleth into mischief.
3. ^20:15Wise words are more valuable than much gold and many rubies. 
4. ^15:23Everyone enjoys a fitting reply; it is wonderful to say the right thing at the right time!
5. ^25:11A word fitly spoken is like apples of gold in pictures of silver.
6. ^17:20The crooked heart will not prosper; the lying tongue tumbles into trouble.
7. ^10:19Too much talk leads to sin.  Be sensible and keep your mouth shut.
8. ^12:14Wise words bring many benefits, and hard work brings rewards.
9. ^11:9With their words, the godless destroy their friends, but knowledge will rescue the righteous.
10. ^11:12It is foolish to belittle one’s neighbor; a sensible person keeps quiet.
11. ^11:13A gossip goes around telling secrets, but those who are trustworthy can keep a confidence.
12. ^11:17Your kindness will reward you, but your cruelty will destroy you.
13. ^13:3Those who control their tongue will have a long life; opening your mouth can ruin everything.
14. ^15:1A gentle answer deflects anger, but harsh words make tempers flare.
15. ^15:4Gentle words are a tree of life; a deceitful tongue crushes the spirit.
16. ^15:26The Lord detests evil plans, but [H]e delights in pure words.
17. ^15:28The heart of the godly thinks carefully before speaking; the mouth of the wicked overflows with evil words.
18. ^16:23-24From a wise mind comes wise speech; the words of the wise are persuasive.  Kind words are like honey—sweet to the soul and healthy for the body.
19. ^16:27Scoundrels create trouble; their words are a destructive blaze.
20. ^16:28A troublemaker plants seeds of strife; gossip separates the best of friends.
21. ^17:14Starting a quarrel is like opening a floodgate, so stop before a dispute breaks out.
22. ^17:27-28A truly wise person uses few words; a person with understanding is even-tempered.  Even fools are thought wise when they keep silent; with their mouths shut, they seem intelligent.
23. ^18:6-7Fools’ words get them into constant quarrels; they are asking for a beating.  The mouths of fools are their ruin; they trap themselves with their lips.
24. ^18:21The tongue can bring death or life; those who love to talk will reap the consequences.
25. ^21:23Watch your tongue and keep your mouth shut, and you will stay out of trouble.
26. ^25:15Patience can persuade a prince, and soft speech can break bones.
27. ^25:23As surely as a north wind brings rain, so a gossiping tongue causes anger!
28. ^26:20-21Fire goes out without wood, and quarrels disappear when gossip stops.  A quarrelsome person starts fights as easily as hot embers light charcoal or fire lights wood.
29. ^26:22Rumors are dainty morsels that sink deep into one’s heart.
30. ^12:14A man shall be satisfied with good by the fruit of his mouth: and the recompense of a man’s hands shall be rendered unto him.
31. ^26:28A lying tongue hateth those that are afflicted by it; and a flattering mouth worketh ruin. 

Controlling Your Temper  

1. ^14:17Short-tempered people do foolish things, and schemers are hated.
2. ^14:29People with understanding control their anger; a hot temper shows great foolishness.
3. ^15:18A hot-tempered person starts fights; a cool-tempered person stops them.
4. ^16:32Better to be patient than powerful; better to have self-control than to conquer a city.
5. ^19:11Sensible people control their temper; they earn respect by overlooking wrongs.
6. ^19:19Hot-tempered people must pay the penalty.  If you rescue them once, you will have to do it again.
7. ^22:24-25Don’t befriend angry people or associate with hot-tempered people, or you will learn to be like them and endanger your soul.
8. ^25:8-10[D]on’t be in a hurry to go to court.  For what will you do in the end if your neighbor deals you a shameful defeat?  When arguing with your neighbor, don’t betray another person’s secret.  Others may accuse you of gossip, and you will never regain your good reputation.
9. ^25:28A person without self-control is like a city with broken-down walls.
10. ^29:11Fools vent their anger, but the wise quietly hold it back.
11. ^29:20There is more hope for a fool than for someone who speaks without thinking.
12. ^29:22An angry person starts fights; a hot-tempered person commits all kinds of sin.
13. ^30:33As the beating of cream yields butter and striking the nose causes bleeding, so stirring up anger causes quarrels.