the lips
Proverbs 10:11,21 The mouth of a righteous man is a well of life: but violence covers the mouth of the wicked...
Proverbs 15:7,23 The lips of the wise disperse knowledge: but the heart of the foolish does not so...
Proverbs 20:15 There is gold, and a multitude of rubies: but the lips of knowledge are a precious jewel.
Proverbs 26:3 A whip for the horse, a bridle for the donkey, and a rod for the fool's back.
Exodus 10:12 And the LORD said to Moses, Stretch out your hand over the land of Egypt for the locusts, that they may come up on the land of Egypt...
Isaiah 50:4 The Lord GOD has given me the tongue of the learned, that I should know how to speak a word in season to him that is weary...
Luke 4:22 And all bore him witness, and wondered at the gracious words which proceeded out of his mouth. And they said, Is not this Joseph's son?
a rod
Proverbs 10:10 He that winks with the eye causes sorrow: but a prating fool shall fall.
Proverbs 7:22 He goes after her straightway, as an ox goes to the slaughter, or as a fool to the correction of the stocks;
Proverbs 17:10 A reproof enters more into a wise man than an hundred stripes into a fool.
Proverbs 27:22 Though you should bray a fool in a mortar among wheat with a pestle, yet will not his foolishness depart from him.
Psalm 32:9 Be you not as the horse, or as the mule, which have no understanding: whose mouth must be held in with bit and bridle...
understanding
Proverbs 6:32 But whoever commits adultery with a woman lacks understanding: he that does it destroys his own soul.