Yechezkel 3:9-11

Orthodox Jewish Bible

⁹ As a shamir (adamant, hardest stone) more chazak than flint have I made thy metzach (forehead); fear them not, neither be terrified at their looks, though they be a bais meri (house of rebellion).

¹⁰ Moreover He said unto me, Ben Adam, all My words that I shall speak unto thee receive in thine lev, and hear with thine oznayim.

¹¹ And go, get thee to them of the Golus, unto the Bnei Amecha, and speak unto them, and tell them, Thus saith Adonoi Hashem; whether they will hear, or whether they will refrain.