John Gill Commentary Job 38:40

"When they couch in their dens, [And] abide in the covert to lie in wait?" — Job 38:40 (ASV)

When they couch in [their] dens, [and] abide in the covert to
lie in wait ?
] Which some understand of old lions, who, for want of strength, lie couchant in their dens, or in some covert place, waiting for any prey that passes by, to seize upon it. But the same pasture and places are used by younger lions, as well as old ones; who are emblems of wicked men, cruel persecutors, and bloodthirsty tyrants, who fill their palaces and kingdoms with murder and rapine; see (Psalms 10:8–10) (Nahum 2:11Nahum 2:12) .