Contradiction with Exodus 4:10
Moses expresses inadequacy in speech, while 1 Corinthians 2:4 speaks of not using enticing words.
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 Isaiah 50:4
Describes God giving eloquent speech to His servant, whereas 1 Corinthians 2:4 emphasizes plain speech.
Isaiah 50:4: The Lord GOD hath given me the tongue of the learned, that I should know how to speak a word in season to [him that is] weary: he wakeneth morning by morning, he wakeneth mine ear to hear as the learned.
Contradiction with Acts 18:24
Apollos is described as eloquent in speech, contrasting with 1 Corinthians 2:4's focus on simplicity.
Acts 18:24: And a certain Jew named Apollos, born at Alexandria, an eloquent man, [and] mighty in the scriptures, came to Ephesus.
Contradiction with Matthew 10:19-20
Promises Spirit-led speech, potentially contrasting with the non-reliance on persuasive words in 1 Corinthians 2:4.
Matthew 10:19-20: But when they deliver you up, take no thought how or what ye shall speak: for it shall be given you in that same hour what ye shall speak.