Treasury of Scripture Knowledge
The heart of the righteous studieth to answer: but the mouth of the wicked poureth out evil things.
The tongue of the wise shall adorn wisdom, but the mouth of fools shall speak foolishness.
The heart of the wise causes his mouth to be prudent, and with his lips he shall increase doctrine.
1 Kings 3:23
Then said the king, The one saith, This is my son that is alive, and thy son is dead. And the other saith, No; but thy son is dead, and my son is alive.
Do not be rash with thy mouth and do not let thy heart be hasty to utter any thing before God, for God is in heaven and thou upon earth; therefore let thy words be few.
1 Peter 3:15
but sanctify the Lord God in your hearts, and be ready always to respond to every man that asks you a reason of the hope that is in you with meekness and reverence,
Wisdom shall rest in the heart of him that is sane and is made known in the midst of the fools.
But those things which proceed out of the mouth come forth from the heart, and they defile the man.