Proverbs 10:11 similarly contrasts the righteous mouth as a fountain of life with the wicked mouth concealing violence.

In Proverbs 11:11, the mouth of the wicked overthrows a city — expanding on the destructive speech contrasted here.

In Proverbs 12:6, the mouth of the upright delivers — reinforcing that righteous speech is life-giving, unlike wicked words.

In Proverbs 12:18, the tongue of the wise brings healing — similar to the righteous knowing acceptable speech here.

In Proverbs 15:2, the tongue of the wise commends knowledge — paralleling the righteous lips that know what is acceptable.

Proverbs 15:28 echoes the same contrast: the righteous think before speaking, while the wicked spew evil — both emphasize careful versus reckless speech.

In Proverbs 18:6-8, the destructive consequences of fools' speech reinforce the contrast between righteous and wicked lips.

Ecclesiastes 10:12 parallels this — wise words are gracious, but a fool's lips destroy him.

Matthew 15:18 explains that wicked speech flows from a corrupt heart, grounding the reason for perverse lips.

Ephesians 4:29 commands no corrupt talk but only building-up words, reflecting the righteous standard.

In Ecclesiastes 12:10, the Preacher seeks 'words of delight' — akin to the righteous knowing what is acceptable.

In Titus 2:8, 'sound speech' that cannot be condemned parallels the righteous lips knowing what is acceptable.