James 3:2
We all stumble in many ways. If anyone is never at fault in what he says, he is a perfect man, able to control his whole body.

Psalm 34:13
Keep your tongue from evil and your lips from deceitful speech.

Psalm 141:3
Set a guard, O LORD, over my mouth; keep watch at the door of my lips.

Proverbs 10:14
The wise store up knowledge, but the mouth of the fool invites destruction.

Proverbs 13:4
The slacker craves, yet gets nothing, but the soul of the diligent is fully satisfied.

Proverbs 18:7
A fool's mouth is his ruin, and his lips are a snare to his soul.

Proverbs 18:21
Life and death are in the power of the tongue, and those who love it will eat its fruit.

Proverbs 20:19
He who reveals secrets is a constant gossip; avoid the one who babbles with his lips.

Proverbs 21:23
He who guards his mouth and tongue keeps his soul from distress.