Job 40:18 KJV
His bones are as strong pieces of brass; his bones are like bars of iron.
Job 40:18, King James Version
In context
17 He moveth his tail like a cedar: the sinews of his stones are wrapped together.
18 His bones are as strong pieces of brass; his bones are like bars of iron.
19 He is the chief of the ways of God: he that made him can make his sword to approach unto him.