Job 41:26

“The sword of him that layeth at him cannot hold, etc.] It is either broken by striking at him, or however cannot pierce him and stick in him; but since a sword is not used in fishery, rather the harpagon or harpoon may be meant, which cannot enter into the crocodile, being so fenced with scales; but the whale being struck with it, it enters deep into his flesh, and is wounded by it; wherefore this and what follows in the next verses seems best to agree with the crocodile, or some other fish; the spear, the dart, nor the habergeon; that is, neither of these can fasten upon him or enter into him: and yet it is certain that the whale, after he has been struck and wounded by the harping-iron,…”

“cannot hold--on his hard skin. habergeon--coat of mail; avail must be taken by zeugma out of "hold," as the verb in the second clause: "hold" cannot apply to the "coat of mail."”

“The sword of him that layeth at him - The word “sword” here (חרב chereb) means undoubtedly “harpoon,” or a sharp instrument by which an attempt is made to pierce the skin of the monster. Cannot hold - That is, in the hard skin. It does not penetrate it. The spear, the dart - These were doubtless often used in the attempt to take the animal. The meaning is, that “they” would not hold or stick to the animal. They flew off when hurled at him. Nor the habergeon - Margin, “breastplate.” Noyes, “javelin.” Prof. Lee, “lance.” Vulgate, “thorax, breastplate.” So the Septuagint, θώρακα thōraka. The word used here (שׁריה shiryâh), the same as שׁריון shiryôn 1 Samuel 17:5, 1 Samuel 17:38; Neh 4:16;…”

“Hold - Heb. cannot stand, cannot endure the stroke, but will be broken by it. The crocodile's skin, no sword, nor dart, nor musquet bullet can pierce. Job 41:28”

“The sword: Job 39:21-24 habergeon: or, breastplate Job 41:28”

“26 If one reacheth him with the sword-it doth not hold; Neither spear, nor dart, nor harpoon. 27 He esteemeth iron as straw, Brass as rotten wood. 28 The son of the bow doth not cause him to flee, Sling stones are turned to stubble with him. 29 Clubs are counted as stubble, And he laugheth at the shaking of the spear. משּׂיגהוּ, which stands first as nom. abs., "one reaching him," is equivalent to, if one or whoever reaches him, Ew. 357, c, to which בּלי תקוּם, it does not hold fast (בּלי with v. fin., as Hos 8:7; Hos 9:16, Chethb), is the conclusion. חרב is instrumental, as Psa 17:13. מסּע, from נסע, Arab. nz‛, to move on, hasten on, signifies a missile, as Arab. minz‛a, an arrow, manz‛a, a…”