Proverbs 10:6 shares the identical phrase 'the mouth of the wicked conceals violence,' making it a neighboring parallel.

Proverbs 10:20 compares the righteous tongue to choice silver, reinforcing the value of righteous speech seen in the 'fountain of life'.

Proverbs 10:21 says the lips of the righteous feed many, expanding on the nourishing 'fountain of life' from the main verse.

Proverbs 10:32 adds that the righteous know what is acceptable, while the wicked speak perversity — a direct contrast to the life-giving mouth.

In Proverbs 10:13, the discerning's lips produce wisdom — paralleling the righteous mouth as a fountain of life in verse 11.

In Proverbs 10:31, the righteous mouth yields wisdom (fruit) — a parallel to the fountain of life from verse 11.

Proverbs 13:14 uses the same 'fountain of life' phrase for the teaching of the wise, directly linking to the righteous mouth's description.

Proverbs 16:22-24 calls understanding a fountain of life and describes pleasant words as healing, echoing the life-giving speech theme.

In Proverbs 13:2, the fruit of lips brings good things — mirroring the fountain of life from the righteous mouth in verse 11.

Proverbs 15:7 states that the lips of the wise spread knowledge, paralleling the righteous mouth as a fountain of life.

Proverbs 18:4 compares words to deep waters and the fountain of wisdom to a brook, using similar water imagery for speech.

James 3:5-8 describes the tongue as a fire of unrighteousness, echoing the destructive potential of the wicked's mouth contrasted with the righteous fountain.

Psalm 37:30 echoes that the righteous mouth speaks wisdom and justice, reinforcing the 'fountain of life' image.

Ephesians 4:29 elaborates on wholesome speech that builds up, aligning with the fountain of life contrasted with corrupt talk.

Matthew 12:34-37 teaches the mouth speaks from the heart's overflow — linking the righteous fountain to good treasure and judgment.

Ecclesiastes 10:12-14 contrasts wise and foolish speech, with the fool's many words leading to madness — similar to the fountain vs. concealment.

In John 7:38, Jesus describes believers as sources of living water — fulfilling the OT image of the righteous mouth as a fountain of life.

In Psalm 140:9, the wicked's lips bring trouble on themselves — a parallel to the mouth concealing violence in Proverbs 10:11.