Proverbs 1:8 is the father's opening call to heed instruction, setting the same parent-child wisdom context as Proverbs 5:2.

Proverbs 23:12 applies heart to instruction and ears to knowledge, closely matching the pursuit of discretion in Proverbs 5:2.

In Proverbs 15:2, the wise tongue adorns knowledge—similar to preserving knowledge on the lips here.

In Proverbs 15:7, the wise spread knowledge—complementing the call to preserve it on the lips here.

In Proverbs 16:23, wise hearts make lips prudent and promote instruction—echoing the preservation of knowledge here.

In Proverbs 20:15, lips that speak knowledge are a rare jewel—reinforcing the value of preserving knowledge here.

Proverbs 22:17 urges attention to wise sayings, reinforcing the same theme of receiving and preserving knowledge.

Psalm 119:13 has the psalmist recounting God's laws with his lips, directly mirroring the call to preserve knowledge through speech.

Malachi 2:7 directly states the priest's lips should preserve knowledge — nearly identical wording to Proverbs 5:2.

Malachi 2:6 praises a priest with true instruction on his lips, echoing the ideal of lips that preserve knowledge.