Contradiction with Matthew 5:39
Proverbs 19:29 talks about judgments and punishment for scorners, whereas Matthew 5:39 advises to not resist evil and to turn the other cheek instead of seeking retribution.
Matthew 5:39: But I say unto you, That ye resist not evil: but whosoever shall smite thee on thy right cheek, turn to him the other also.
Contradiction with Luke 6:27-28
Proverbs 19:29 suggests punishment for the wicked, while Luke 6:27-28 encourages loving your enemies and blessing those who curse you.
Luke 6:27-28: But I say unto you which hear, Love your enemies, do good to them which hate you,
Contradiction with Romans 12:17
Proverbs 19:29 implies retribution for mockers, whereas Romans 12:17 advises not to repay anyone evil for evil.
Romans 12:17: Recompense to no man evil for evil. Provide things honest in the sight of all men.
Contradiction with 1 Peter 3:9
Proverbs 19:29 speaks of judgments prepared for scorners, but 1 Peter 3:9 counsels not to repay evil with evil or insult with insult.
1 Peter 3:9: Not rendering evil for evil, or railing for railing: but contrariwise blessing; knowing that ye are thereunto called, that ye should inherit a blessing.
Contradiction with Proverbs 25:21-22
Although also in Proverbs, this passage promotes a different approach of providing for your enemy rather than judgment and punishment, which is the tone of Proverbs 19:29.
Proverbs 25:21-22: If thine enemy be hungry, give him bread to eat; and if he be thirsty, give him water to drink:
Paradox #1
This verse warns of consequences for foolish behavior, which might seem at odds with messages of forgiveness and mercy found in other parts of the Bible. It could raise questions about how justice and mercy can coexist.