Gregory the Great, on Job 40:16

“He sleepeth under the shadow, in the covert of the reed, and in moist places.”

“What is understood by the loins except the delight of the flesh? Hence the Psalmist also asks, saying: "Burn my loins." For if he had not known that the pleasure of lust resides in the loins, he would by no means have asked that they be burned. Hence, because the power of the devil has prevailed over the human race especially through lust, it is said of him by the voice of the Lord: "His power is in his loins." Therefore he who eats the Passover ought to have his loins girded, so that he who celebrates the solemnity of resurrection and incorruption may no longer be subject to corruption through any vices, may subdue pleasures, and may restrain the flesh from lust.”

Imported from an open dataset — not yet checked against the printed edition.