Ezekiel 1:22; Ezekiel 2:6; Ezekiel 3:9; Ezekiel 11:8

22 And the likeness of the firmament upon the heads of the living creature was as the colour of the terrible crystal, stretched forth over their heads above.
6 And thou, son of man, be not afraid of them, neither be afraid of their words, though briers and thorns be with thee, and thou dost dwell among scorpions: be not afraid of their words, nor be dismayed at their looks, though they be a rebellious house.
9 As an adamant harder than flint have I made thy forehead: fear them not, neither be dismayed at their looks, though they be a rebellious house.
8 Ye have feared the sword; and I will bring a sword upon you, saith the Lord GOD.