Contradiction with Matthew 13:15
This verse mentions the people who have closed their ears and eyes, contradicting the call to listen in Revelation 13:9.
Matthew 13:15: For this people's heart is waxed gross, and [their] ears are dull of hearing, and their eyes they have closed; lest at any time they should see with [their] eyes, and hear with [their] ears, and should understand with [their] heart, and should be converted, and I should heal them.
Contradiction with Proverbs 28:9
This verse suggests that those who turn away their ears from the law are an abomination, while Revelation 13:9 invites everyone to listen and hear.
Proverbs 28:9: He that turneth away his ear from hearing the law, even his prayer [shall be] abomination.
Contradiction with Jeremiah 5:21
This verse points out the folly of those who do not hear, whereas Revelation 13:9 assumes they can choose to hear.
Jeremiah 5:21: Hear now this, O foolish people, and without understanding; which have eyes, and see not; which have ears, and hear not: [understanding: Heb. heart]
Contradiction with Isaiah 6:10
This verse involves a prophecy about making hearts fat and ears heavy, contrasting with the open call in Revelation 13:9 for those who have ears to hear.
Isaiah 6:10: Make the heart of this people fat, and make their ears heavy, and shut their eyes; lest they see with their eyes, and hear with their ears, and understand with their heart, and convert, and be healed.
Contradiction with Acts 28:27
Here, people are unwilling or unable to hear, which contrasts with the inclusive willingness to hear in Revelation 13:9.
Acts 28:27: For the heart of this people is waxed gross, and their ears are dull of hearing, and their eyes have they closed; lest they should see with [their] eyes, and hear with [their] ears, and understand with [their] heart, and should be converted, and I should heal them.