'Backs' in the Bible

And mine enemies didst thou make to turn their backs unto me, and those that hated me I destroyed.

For You will make them turn their backs [in defeat];You will aim Your bowstring [of divine justice] at their faces.

You lured us into a trap;You placed burdens on our backs.

Let their eyes be darkened, so that they can't see. Let their backs be continually bent.