4Then He said to me, “Son of man, go now to the house of Israel and speak My words to them.
5For you are not being sent to a people of unfamiliar speech or difficult language, but to the house of Israel —
6not to the many peoples of unfamiliar speech and difficult language whose words you cannot understand. Surely if I had sent you to them, they would have listened to you.
7But the house of Israel will be unwilling to listen to you, since they are unwilling to listen to Me. For the whole house of Israel is hard-headed and hard-hearted.
8Behold, I will make your face as hard as their faces, and your forehead as hard as their foreheads.
9I will make your forehead like a diamond, harder than flint. Do not be afraid of them or dismayed at their presence, even though they are a rebellious house.”
— Ezekiel 3:4-9