Cross reference
Job 40:18
18 Truly, if the river is overflowing, it gives him no cause for fear; he has no sense of danger, even if Jordan is rushing against his mouth.
Job 7:12
12 Am I a sea, or a sea-beast, that you put a watch over me?
Isaiah 48:4
4 Because I saw that your heart was hard, and that your neck was an iron cord, and your brow brass;