Job 40:21

He lieth under the shady trees, in the covert of the reed, and fens.

Ver. 21. He lieth under the shady trees] Vatablus readeth the words questioning thus, Lieth he under the shady trees, in the covert of the reeds and fens? No such matter, he is too big to be shaded by trees; neither can reeds and fens cover him (So R. Levi, and Kimchi). But Aristotle tells us, That he loves to lie by the banks of rivers beset with trees, as being naturally hot, and bred in hot countries; and yet he is impatient with cold and winter (De Hist. Anim. l. 9, c. 46). And therefore when Hannibal brought many elephants out of Africa into italy, they all perished in the cold Alps, except only that one whereupon Hannibal himself rode (Pliny lib. 8, c. 10).

In the covert of the reed, and fens] Hence Cardinus saith, That the elephant is of a swinish nature, delighted with mud and mire, Ad calorem frangendum crasso coeno perfunduntur (Plin.). And Gulielmus Parisiensis applieth Behemoth in the fens, to the devil in sensual hearts. He sleepeth in moist places, saith he; that is, in those that lie melting in sinful pleasures and delights; therefore, Luke 11:24, it is said that he walketh in dry places, seeking rest, but finding none; and, Ezekiel 47:11, when the waters of the sanctuary overflowed, the miry places could not be healed.