He that has knowledge spares his words: and a man of understanding is of an excellent spirit.
Proverbs 10:19 In the multitude of words there wants not sin: but he that refrains his lips is wise.
Proverbs 15:28 The heart of the righteous studies to answer: but the mouth of the wicked pours out evil things.
James 1:19 Why, my beloved brothers, let every man be swift to hear, slow to speak, slow to wrath:
James 3:2 For in many things we offend all. If any man offend not in word, the same is a perfect man, and able also to bridle the whole body.
an excellent spirit
Proverbs 16:32 He that is slow to anger is better than the mighty; and he that rules his spirit than he that takes a city.
Ecclesiastes 9:17 The words of wise men are heard in quiet more than the cry of him that rules among fools.
James 3:18 And the fruit of righteousness is sown in peace of them that make peace.