Proverbs 10:1 repeats the same wisdom saying almost verbatim, reinforcing the contrast between wise and foolish children.

Proverbs 23:15 echoes the same cause for joy—a wise son—deepening the principle of parental gladness.

Proverbs 23:16 adds that the father rejoices when the son speaks rightly, expanding the joy to wise speech.

Proverbs 23:22 commands listening to father and not despising mother, directly echoing both parts of the wise son/foolish man contrast.

Proverbs 29:3 parallels the wise son bringing joy, contrasting with a squandering companion.

Proverbs 30:17 warns that mocking parents brings severe judgment—the ultimate consequence of the foolish man's despising his mother.

Proverbs 17:21 states that fathering a fool brings sorrow and no joy—the opposite outcome of the wise son who makes his father glad.

Proverbs 17:25 says a foolish son is grief to his father and bitterness to his mother—directly inverting the joy and honor in 15:20.

Proverbs 19:13 equates a foolish son with destruction to his father—emphasizing the ruin that contrasts with the wise son's gladness.

Proverbs 23:24 promises great rejoicing for the father of a righteous or wise son—directly matching the first line of 15:20.

Proverbs 27:11 urges a son to be wise to make his father's heart glad—a direct echo of the wise son's effect in 15:20.

Proverbs 13:1 contrasts a wise son who accepts discipline with a scoffer—similar to the wise/foolish divide but focused on response to correction.

Exodus 20:12 gives the foundational command to honor parents—the wise son fulfills it, the foolish one violates it.

Leviticus 19:3 commands revering mother and father, reinforcing the standard the wise son meets and the foolish man rejects.