Ezekiel 3:9, 26-27

Like adamant stone, harder than flint, I have made your forehead; do not be afraid of them, nor be dismayed at their looks, though they are a rebellious house.”

I will make your tongue cling to the roof of your mouth, so that you shall be mute and not be one to rebuke them, for they are a rebellious house. But when I speak with you, I will open your mouth, and you shall say to them, ‘Thus says the Lord GOD.’ He who hears, let him hear; and he who refuses, let him refuse; for they are a rebellious house.