Ezekiel 3:6

He said to me, “Son of man, eat this scroll that I give you and fill your belly and your bowels with it.”

Then I ate it. It was as sweet as honey in my mouth.

He said to me, “Son of man, go to the house of Israel, and speak my words to them.

For you are not sent to a people of a strange speech and of a hard language, but to the house of Israel—

But the house of Israel will not listen to you, for they will not listen to me; for all the house of Israel are obstinate and hard-hearted.

Behold, I have made your face hard against their faces, and your forehead hard against their foreheads.

I have made your forehead as a diamond, harder than flint. Don’t be afraid of them, neither be dismayed at their looks, though they are a rebellious house.”