Like the hardest stone, harder than flint, I have made your forehead; do not fear them or be dismayed at their looks, for they are a rebellious house.
He said to me: Mortal, all my words that I shall speak to you receive in your heart and hear with your ears;
then go to the exiles, to your people, and speak to them. Say to them, "Thus says the Lord God"; whether they hear or refuse to hear.
Then the spirit lifted me up, and as the glory of the Lord rose from its place, I heard behind me the sound of loud rumbling;
References for Ezekiel 3:12
it was the sound of the wings of the living creatures brushing against one another, and the sound of the wheels beside them, that sounded like a loud rumbling.
The spirit lifted me up and bore me away; I went in bitterness in the heat of my spirit, the hand of the Lord being strong upon me.
I came to the exiles at Tel-abib, who lived by the river Chebar. And I sat there among them, stunned, for seven days.
References for Ezekiel 3:15
At the end of seven days, the word of the Lord came to me:
Mortal, I have made you a sentinel for the house of Israel; whenever you hear a word from my mouth, you shall give them warning from me.
If I say to the wicked, "You shall surely die," and you give them no warning, or speak to warn the wicked from their wicked way, in order to save their life, those wicked persons shall die for their iniquity; but their blood I will require at your hand.
But if you warn the wicked, and they do not turn from their wickedness, or from their wicked way, they shall die for their iniquity; but you will have saved your life.