Proverbs 17:27-28
27 A man of knowledge uses words with restraint,
and a man of understanding is even-tempered.

28 Even a fool is thought wise if he keeps silent,
and discerning if he holds his tongue.

Proverbs 21:23
23 He who guards his mouth and his tongue
keeps himself from calamity.

Proverb

Proverbs 29:20
20 Do you see a man who speaks in haste?
There is more hope for a fool than for him.

Psalm 34:13
13 keep your tongue from evil and your lips from speaking lies.

Isaiah 50:4
4 The Sovereign LORD has given me an instructed tongue,
to know the word that sustains the weary.

Proverbs 25:11
11 A word aptly spoken is like apples of gold in settings of silver.

Ps 19:14
14 May the words of my mouth and the meditation of my heart
be pleasing in your sight,
O LORD, my Rock and my Redeemer.

Prov 10:19
19 When words are many, sin is not absent,
but he who holds his tongue is wise.

Ecclesiastes 10:12
12 Words from a wise man’s mouth are gracious,
but a fool is consumed by his own lips.

Ephesians 4:29
29 Do not let any unwholesome talk come out of your mouths, but only what is helpful for building others up according to their needs, that it may benefit those who listen.