Ezekiel 3:7-9

7But the house of Israel will not want to listen to you because they do not want to listen to me. For the whole house of Israel is hardheaded and hardhearted.

8Look, I have made your face as hard as their faces and your forehead as hard as their foreheads.

9I have made your forehead like a diamond, harder than flint. Don’t be afraid of them or discouraged by the look on their faces, though they are a rebellious house.”