The demon Behemoth appears in the books Paradise Lost and Dictionnaire Infernal
From The Bible:
Job 40:15-18
“Look at Behemoth,
which I made just as I made you;
it eats grass like an ox.Its strength is in its loins,
and its power in the muscles of its belly.It makes its tail stiff like a cedar;
the sinews of its thighs are knit together.Its bones are tubes of bronze,
its limbs like bars of iron.
