Proverbs 13:3
He who keeps his mouth guards his life; he who opens his lips, ruin [belongs] to him.
Proverbs 21:23
He who guards his mouth and his tongue, he guards his life from danger.
Proverbs 12:13
By the transgression of lips, evil is ensnared, but the righteous escapes from trouble.
Proverbs 18:7
The mouth of a fool [is] ruin to him, and his lips [are] a snare to his soul.
Proverbs 18:21
Death and life [are] in the {power} of the tongue, and those who love her will eat of her fruit.
Psalm 39:1
I said, "I will guard my ways {that I may not sin} with my tongue. I will keep a muzzle over my mouth as long as [the] wicked [are] before me."
Proverbs 10:19
In many words, transgression is not lacking, but he who restrains his lips is prudent.
Proverbs 20:19
He reveals a secret, he who walks [about with] gossip, and do not associate with a babbler's lips.
Matthew 12:36-37
But I tell you that every worthless word that they speak, people will give an account for it on the day of judgment!
James 1:26
If anyone thinks he is religious, [although he] does not bridle his tongue but deceives his heart, this person's religion [is] worthless.
James 3:2-12
For we all stumble [in] many [ways]. If anyone does not stumble in what he says, he [is] a perfect individual, able to hold in check his whole body also.