Job 40:16 in the World English Bible
Look now, his strength is in his thighs. His force is in the muscles of his belly.
Context
15 Behold now behemoth, which I made with thee; he eateth grass as an ox.
16 Lo now, his strength is in his loins, and his force is in the navel of his belly.
17 He moveth his tail like a cedar: the sinews of his stones are wrapped together.