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

“Life and death are in the power of the tongue, and those who love it will eat its fruit. He who guards his mouth protects his life, but the one who opens his lips invites his own ruin. He who goes about as a slanderer reveals secrets, therefore, do not associate with a gossip. You must not go about spreading slander among your people nor endanger the life of your neighbor with your tongue.”