Canst thou put a hook into his nose - Or rather, a “rope,” or “cord.” The word used here (אגמון 'agmôn) means “a caldron,” or “kettle” Job 41:20, also a reed, or bulrush, growing in marshy places, and thus a rope made of reeds, a rush-cord. The idea is, that he could not be led about by a cord, as tame animals may be. Mr. Vansittart, however, supposes that the words here are expressive of ornaments, and that the allusion is to the fact mentioned by Herodotus, that the crocodile was led about by the Egyptians as a divinity, and that in this state it was adorned with rings and various stately trappings. There can be no doubt that such a fact existed, but this does not accord well with the scope of the passage here. The object is to impress the mind of Job with a sense of the strength and untamableness of the animal, not to describe the honors which were paid to it.
Or bore his jaw through with a thorn - Or with a ring. The word here properly means a thorn, or thorn-bush, Job 31:40; Proverbs 26:9; and then also a ring that was put through the nose of an animal, in order to secure it. The instrument was probably made sharp like a thorn or spike, and then bent so as to become a ring; compare Isaiah 37:29. Mr. Bruce, speaking of the manner of fishing in the Nile, says that when a fisherman has caught a fish, he draws it to the shore, and puts a strong iron ring into its jaw. To this ring is fastened a rope by which the fish is attached to the shore, which he then throws again into the water. “Rosenmuller.”