Ezekiel 3:6-10

nor to many peoples of unintelligible speech or difficult language, whose words you cannot understand. But I have sent you to the people who understand you;

yet the house of Israel will not be willing to listen to you, since they are not willing to listen to Me. The entire house of Israel certainly is stubborn and obstinate.

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

Like emery harder than flint I have made your forehead. Do not be afraid of them or be dismayed before them, since they are a rebellious house.”

Moreover, He said to me, “Son of man, take into your heart all My words which I will speak to you and listen closely.