Contradiction with Matthew 6:3
This verse instructs not to let others know about one's charitable deeds, contradicting the notion of boasting about the zeal mentioned in 2 Corinthians 9:2.
Matthew 6:3: But when thou doest alms, let not thy left hand know what thy right hand doeth:
Contradiction with Proverbs 27:2
Advises letting another person, not oneself, praise one's accomplishments, contrasting with the public boasting of zeal in 2 Corinthians 9:2.
Proverbs 27:2: Let another man praise thee, and not thine own mouth; a stranger, and not thine own lips.
Contradiction with James 4:16
Warns against boasting and taking pride, which contrasts with the boasting described in 2 Corinthians 9:2.
James 4:16: But now ye rejoice in your boastings: all such rejoicing is evil.
Contradiction with Galatians 5:26
Advises not to become boastful or provoke one another, contradicting the act of boasting about others' zeal in 2 Corinthians 9:2.
Galatians 5:26: Let us not be desirous of vain glory, provoking one another, envying one another.