Contradiction with Exodus 4:10
This verse mentions Moses expressing his slowness of speech, whereas Acts 13:9 shows Paul, filled with the Holy Ghost, speaking boldly.
Exodus 4:10: And Moses said unto the LORD, O my Lord, I [am] not eloquent, neither heretofore, nor since thou hast spoken unto thy servant: but I [am] slow of speech, and of a slow tongue. [eloquent: Heb. a man of words] [heretofore: Heb. since yesterday, nor since the third day]
Contradiction with Matthew 6:3
This verse advises not to let the left hand know what the right hand does, promoting humility and secrecy, while Acts 13:9 illustrates a public and assertive act.
Matthew 6:3: But when thou doest alms, let not thy left hand know what thy right hand doeth:
Contradiction with 1 Corinthians 14:28
Advises silence in the church if there is no interpreter, contrasting with the bold and public action of Acts 13:9.
1 Corinthians 14:28: But if there be no interpreter, let him keep silence in the church; and let him speak to himself, and to God.
Contradiction with James 1:19
Encourages being slow to speak, unlike the promptness of action seen in Acts 13:9.
James 1:19: Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath:
Contradiction with 1 Corinthians 2:3-4
Paul describes approaching with weakness and fear, differing from the boldness in Acts 13:9.
1 Corinthians 2:3-4: And I was with you in weakness, and in fear, and in much trembling.