Ezekiel 3:4-8

MLV(i) 4 And he said to me, Son of man, go, get to the house of Israel and speak to them with my words. 5 For you are not sent to a people of a strange speech and of a hard language, but to the house of Israel, 6 not to many peoples of a strange speech and of a hard language, whose words you cannot understand.
Surely, if I sent you to them, they would listen to you. 7 But the house of Israel will not listen to you, for they will not listen to me. For all the house of Israel are of a hard forehead and of a stiff heart.
8 Behold, I have made your face hard against their faces and your forehead hard against their foreheads.