Read it through once

He stood as erect as that tent-prop, both arms stretched out wide On the great cross-support in the centre, that goes to each side; {30} He relaxed not a muscle, but hung there as, caught in his pangs And waiting his change, the king serpent all heavily hangs, Far away from his kind, in the pine, till deliverance come With the spring-time,--so agonized Saul, drear and stark, blind and dumb.