Ezekiel 3:4-7

4And he said unto me, Son of man, go, get thee unto the house of Israel, and speak with my words unto them.

5For thou art not sent to a people of strange language, and of difficult speech, [but] to the house of Israel;

6not to many peoples of strange language and of difficult speech, whose words thou canst not understand: had I sent thee to them, would they not hearken unto thee?

7But the house of Israel will not hearken unto thee, for none of them will hearken unto me. For all the house of Israel are hard of forehead and stiff of heart.