Psalms 34:13

⁵So the tongue is also a little member, and boasts great things. See how a small fire can spread to a large forest! ⁶And the tongue is a fire. The world of iniquity among our members is the tongue, which defiles the whole body, and sets on fire the course of nature, and is set on fire by Gehenna.^7[+] For every kind of animal, bird, creeping thing, and sea creature is tamed, and has been tamed by mankind; ⁸but nobody can tame the tongue. It is a restless evil, full of deadly poison. ⁹With it we bless our God and Father, and with it we curse men who are made in the image of God. ¹⁰Out of the same mouth comes blessing and cursing. My brothers, these things ought not to be so.

³Set a watch, LORD, before my mouth. Keep the door of my lips.

²³Whoever guards his mouth and his tongue keeps his soul from troubles.

²²who didn’t sin, “neither was deceit found in his mouth.”

²⁶If anyone among you thinks himself to be religious while he doesn’t bridle his tongue, but deceives his heart, this man’s religion is worthless.

⁹Don’t lie to one another, seeing that you have put off the old man with his doings,

¹⁹So, then, my beloved brothers, let every man be swift to hear, slow to speak, and slow to anger;

³He who guards his mouth guards his soul. One who opens wide his lips comes to ruin.

¹I said, “I will watch my ways, so that I don’t sin with my tongue. I will keep my mouth with a bridle while the wicked is before me.”

²For we all stumble in many things. Anyone who doesn’t stumble in word is a perfect person, able to bridle the whole body also.