Proverbs 5:2
"That thou mayest regard discretion, and that thy lips may keep knowledge."
Cross References (ranked by relevance)
The lips of the wise disperse knowledge: but the heart of the foolish doeth not so.
The heart of the wise teacheth his mouth, and addeth learning to his lips.
Thy lips, O my spouse, drop as the honeycomb: honey and milk are under thy tongue; and the smell of thy garments is like the smell of Lebanon.
With my lips have I declared all the judgments of thy mouth.
My mouth shall shew forth thy righteousness and thy salvation all the day; for I know not the numbers thereof.
The lips of the righteous feed many: but fools die for want of wisdom.
Thou art fairer than the children of men: grace is poured into thy lips: therefore God hath blessed thee for ever.
The tongue of the wise useth knowledge aright: but the mouth of fools poureth out foolishness.
There is gold, and a multitude of rubies: but the lips of knowledge are a precious jewel.