Ezekiel 3:7-9

But the house of Israel will not listen to you, because they will not listen to Me; for all the house of Israel are impudent and hard-hearted. Behold, I have made your face strong against their faces, and your forehead strong against their foreheads. 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.”