Proverbs 16:21
"The wise in heart shall be called prudent: and the sweetness of the lips increaseth learning."
Cross References (ranked by relevance)
The Lord GOD hath given me the tongue of the learned, that I should know how to speak a word in season to him that is weary: he wakeneth morning by morning, he wakeneth mine ear to hear as the learned.
The lips of the wise disperse knowledge: but the heart of the foolish doeth not so.
Ointment and perfume rejoice the heart: so doth the sweetness of a man’s friend by hearty counsel.
But the wisdom that is from above is first pure, then peaceable, gentle, and easy to be intreated, full of mercy and good fruits, without partiality, and without hypocrisy.
The officers answered, Never man spake like this man.
And all bare him witness, and wondered at the gracious words which proceeded out of his mouth. And they said, Is not this Joseph’s son?
The wise in heart will receive commandments: but a prating fool shall fall.
Behold, I have done according to thy words: lo, I have given thee a wise and an understanding heart; so that there was none like thee before thee, neither after thee shall any arise like unto thee.
The preacher sought to find out acceptable words: and that which was written was upright, even words of truth.
My son, if thine heart be wise, my heart shall rejoice, even mine.
Thou art fairer than the children of men: grace is poured into thy lips: therefore God hath blessed thee for ever.
For your obedience is come abroad unto all men. I am glad therefore on your behalf: but yet I would have you wise unto that which is good, and simple concerning evil.